[flutter_tools] HACKTOBERFEST (#67882)

HACKTOBERFEST

packages/flutter_tools/lib/runner.dart

@@ -258,7 +258,7 @@ Future<int> _exit(int code) async {
       globals.printTrace('exiting with code $code');
       exit(code);
       completer.complete();
-    // This catches all exceptions becauce the error is propagated on the
+    // This catches all exceptions because the error is propagated on the
     // completer.
     } catch (error, stackTrace) { // ignore: avoid_catches_without_on_clauses
       completer.completeError(error, stackTrace);

packages/flutter_tools/lib/src/android/android_device.dart

@@ -49,7 +49,7 @@ const Map<String, HardwareType> kKnownHardware = <String, HardwareType>{
 /// A physical Android device or emulator.
 ///
 /// While [isEmulator] attempts to distinguish between the device categories,
-/// this is a best effort process and not a guarantee; certain phyiscal devices
+/// this is a best effort process and not a guarantee; certain physical devices
 /// identify as emulators. These device identifiers may be added to the [kKnownHardware]
 /// map to specify that they are actually physical devices.
 class AndroidDevice extends Device {

packages/flutter_tools/lib/src/android/gradle.dart

@@ -410,7 +410,7 @@ Future<void> buildGradleApp({
 
   if (exitCode != 0) {
     if (detectedGradleError == null) {
-      BuildEvent('gradle-unkown-failure', flutterUsage: globals.flutterUsage).send();
+      BuildEvent('gradle-unknown-failure', flutterUsage: globals.flutterUsage).send();
       throwToolExit(
         'Gradle task $assembleTask failed with exit code $exitCode',
         exitCode: exitCode,
@@ -608,7 +608,7 @@ Future<void> buildGradleAar({
   }
   if (buildInfo.dartObfuscation) {
     if (buildInfo.mode == BuildMode.debug || buildInfo.mode == BuildMode.profile) {
-      globals.printStatus('Dart obfuscation is not supported in ${toTitleCase(buildInfo.friendlyModeName)} mode, building as unobfuscated.');
+      globals.printStatus('Dart obfuscation is not supported in ${toTitleCase(buildInfo.friendlyModeName)} mode, building as un-obfuscated.');
     } else {
       command.add('-Pdart-obfuscation=true');
     }

packages/flutter_tools/lib/src/aot.dart

@@ -117,10 +117,10 @@ class AotBuilder {
       PerformanceMeasurement aot;
       if (expectSo) {
         aot = result.performance.values.firstWhere(
-          (PerformanceMeasurement measurement) => measurement.analyicsName == 'android_aot');
+          (PerformanceMeasurement measurement) => measurement.analyticsName == 'android_aot');
       } else {
         aot = result.performance.values.firstWhere(
-          (PerformanceMeasurement measurement) => measurement.analyicsName == 'ios_aot');
+          (PerformanceMeasurement measurement) => measurement.analyticsName == 'ios_aot');
       }
       globals.printStatus('frontend(CompileTime): ${kernel.elapsedMilliseconds} ms.');
       globals.printStatus('snapshot(CompileTime): ${aot.elapsedMilliseconds} ms.');

packages/flutter_tools/lib/src/base/analyze_size.dart

@@ -310,9 +310,9 @@ class SizeAnalyzer {
       color = TerminalColor.yellow;
     }
 
-    // Compute any preceeding directories, and compare this to the stored
-    // directoried (in _leadingPaths) for the last entity that was printed. The
-    // similary determines whether or not leading directory information needs to
+    // Compute any preceding directories, and compare this to the stored
+    // directories (in _leadingPaths) for the last entity that was printed. The
+    // similarly determines whether or not leading directory information needs to
     // be printed.
     final List<String> localSegments = entityName.split('/')
         ..removeLast();

packages/flutter_tools/lib/src/base/bot_detector.dart

@@ -108,7 +108,7 @@ class AzureDetector {
       request.headers.add('Metadata', true);
       await request.close();
     } on SocketException {
-      // If there is an error on the socket, it probalby means that we are not
+      // If there is an error on the socket, it probably means that we are not
       // running on Azure.
       return _isRunningOnAzure = false;
     } on HttpException {

packages/flutter_tools/lib/src/base/command_help.dart

@@ -270,7 +270,7 @@ class CommandHelpOption {
     message.write(''.padLeft(width - parentheticalText.length));
     message.write(_terminal.color(parentheticalText, TerminalColor.grey));
 
-    // Terminals seem to require this because we have both boldened and colored
+    // Terminals seem to require this because we have both bolded and colored
     // a line. Otherwise the next line comes out bold until a reset bold.
     if (_terminal.supportsColor) {
       message.write(AnsiTerminal.resetBold);

packages/flutter_tools/lib/src/base/config.dart

@@ -84,7 +84,7 @@ class Config {
 
   /// Fallback directory in the user's home directory if `XDG_CONFIG_HOME` is
   /// not defined.
-  static const String kXdgConfigFalback = '.config';
+  static const String kXdgConfigFallback = '.config';
 
   /// The default name for the Flutter config file.
   static const String kFlutterSettings = 'settings';

packages/flutter_tools/lib/src/base/error_handling_io.dart

@@ -28,7 +28,7 @@ import 'platform.dart';
 ///
 /// Cf. If there is some hope that the tool can continue when an operation fails
 /// with an error, then that error/operation should not be handled here. For
-/// example, the tool should gernerally be able to continue executing even if it
+/// example, the tool should generally be able to continue executing even if it
 /// fails to delete a file.
 class ErrorHandlingFileSystem extends ForwardingFileSystem {
   ErrorHandlingFileSystem({
@@ -66,7 +66,7 @@ class ErrorHandlingFileSystem extends ForwardingFileSystem {
   /// Delete the file or directory and return true if it exists, take no
   /// action and return false if it does not.
   ///
-  /// This method should be prefered to checking if it exists and
+  /// This method should be preferred to checking if it exists and
   /// then deleting, because it handles the edge case where the file or directory
   /// is deleted by a different program between the two calls.
   static bool deleteIfExists(FileSystemEntity file, {bool recursive = false}) {
@@ -508,7 +508,7 @@ T _runSync<T>(T Function() op, {
 /// as a [ToolExit] using [throwToolExit].
 ///
 /// See also:
-///   * [ErrorHandlngFileSystem], for a similar file system strategy.
+///   * [ErrorHandlingFileSystem], for a similar file system strategy.
 class ErrorHandlingProcessManager extends ProcessManager {
   ErrorHandlingProcessManager({
     @required ProcessManager delegate,

packages/flutter_tools/lib/src/base/file_system.dart

@@ -180,7 +180,7 @@ class LocalFileSystem extends local_fs.LocalFileSystem {
     List<ProcessSignal> fatalSignals = Signals.defaultExitSignals,
   }) : this._(signals, fatalSignals);
 
-  // Unless we're in a test of this class's signal hanlding features, we must
+  // Unless we're in a test of this class's signal handling features, we must
   // have only one instance created with the singleton LocalSignals instance
   // and the catchable signals it considers to be fatal.
   static LocalFileSystem _instance;

packages/flutter_tools/lib/src/build_info.dart

@@ -43,7 +43,7 @@ class BuildInfo {
   /// If not provided, defaults to [NullSafetyMode.autodetect].
   final NullSafetyMode nullSafetyMode;
 
-  /// Whether the build should subdset icon fonts.
+  /// Whether the build should subset icon fonts.
   final bool treeShakeIcons;
 
   /// Represents a custom Android product flavor or an Xcode scheme, null for
@@ -57,7 +57,7 @@ class BuildInfo {
   /// The path to the .packages file to use for compilation.
   ///
   /// This is used by package:package_config to locate the actual package_config.json
-  /// file. If not provded, defaults to `.packages`.
+  /// file. If not provided, defaults to `.packages`.
   final String packagesPath;
 
   final List<String> fileSystemRoots;
@@ -114,7 +114,7 @@ class BuildInfo {
   /// rerun tasks.
   final String performanceMeasurementFile;
 
-  /// If provided, an output directory where one or more v8-style heapsnapshots
+  /// If provided, an output directory where one or more v8-style heap snapshots
   /// will be written for code size profiling.
   final String codeSizeDirectory;
 
@@ -152,14 +152,14 @@ class BuildInfo {
   String get modeName => getModeName(mode);
   String get friendlyModeName => getFriendlyModeName(mode);
 
-  /// the flavor name in the output files is lowercased (see flutter.gradle),
+  /// the flavor name in the output files is lower-cased (see flutter.gradle),
   /// so the lower cased flavor name is used to compute the output file name
   String get lowerCasedFlavor => flavor?.toLowerCase();
 
-  /// Convert to a structued string encoded structure appropriate for usage as
+  /// Convert to a structured string encoded structure appropriate for usage as
   /// environment variables or to embed in other scripts.
   ///
-  /// Fields that are `null` are excluded from this configration.
+  /// Fields that are `null` are excluded from this configuration.
   Map<String, String> toEnvironmentConfig() {
     return <String, String>{
       if (dartDefines?.isNotEmpty ?? false)
@@ -425,7 +425,7 @@ enum TargetPlatform {
   fuchsia_x64,
   tester,
   web_javascript,
-  // The arch specific android target platforms are soft-depreacted.
+  // The arch specific android target platforms are soft-deprecated.
   // Instead of using TargetPlatform as a combination arch + platform
   // the code will be updated to carry arch information in [DarwinArch]
   // and [AndroidArch].

packages/flutter_tools/lib/src/build_system/build_system.dart

@@ -835,7 +835,7 @@ class _BuildInstance {
         elapsedMilliseconds: stopwatch.elapsedMilliseconds,
         skipped: skipped,
         succeeded: succeeded,
-        analyicsName: node.target.analyticsName,
+        analyticsName: node.target.analyticsName,
       );
     }
     return succeeded;
@@ -864,14 +864,14 @@ class PerformanceMeasurement {
     @required this.elapsedMilliseconds,
     @required this.skipped,
     @required this.succeeded,
-    @required this.analyicsName,
+    @required this.analyticsName,
   });
 
   final int elapsedMilliseconds;
   final String target;
   final bool skipped;
   final bool succeeded;
-  final String analyicsName;
+  final String analyticsName;
 }
 
 /// Check if there are any dependency cycles in the target.
@@ -1062,7 +1062,7 @@ class Node {
       }
     }
 
-    // If we depend on a file that doesnt exist on disk, mark the build as
+    // If we depend on a file that doesn't exist on disk, mark the build as
     // dirty. if the rule is not correctly specified, this will result in it
     // always being rerun.
     if (missingInputs.isNotEmpty) {

packages/flutter_tools/lib/src/build_system/depfile.dart

@@ -101,7 +101,7 @@ class DepfileService {
         .map<String>((String path) => path.replaceAllMapped(_escapeExpr, (Match match) => match.group(1)).trim())
         .where((String path) => path.isNotEmpty)
     // The tool doesn't write duplicates to these lists. This call is an attempt to
-    // be resillient to the outputs of other tools which write or user edits to depfiles.
+    // be resilient to the outputs of other tools which write or user edits to depfiles.
         .toSet()
         .map(_fileSystem.file)
         .toList();

packages/flutter_tools/lib/src/build_system/targets/android.dart

@@ -170,7 +170,7 @@ class AndroidAot extends AotElfBase {
 
   /// The selected build mode.
   ///
-  /// This is restricted to [BuildMode.profile] or [BuildMode.relese].
+  /// This is restricted to [BuildMode.profile] or [BuildMode.release].
   final BuildMode buildMode;
 
   @override

packages/flutter_tools/lib/src/build_system/targets/assets.dart

@@ -176,7 +176,7 @@ DevFSContent processSkSLBundle(String bundlePath, {
     bundle['platform'] as String);
   if (bundleTargetPlatform != targetPlatform) {
     logger.printError(
-      'The SkSL bundle was created for $bundleTargetPlatform, but the curent '
+      'The SkSL bundle was created for $bundleTargetPlatform, but the current '
       'platform is $targetPlatform. This may lead to less efficient shader '
       'caching.'
     );

packages/flutter_tools/lib/src/build_system/targets/common.dart

@@ -165,7 +165,7 @@ class ReleaseCopyFlutterBundle extends CopyFlutterBundle {
 ///
 /// Note that this target depends on the `.dart_tool/package_config.json` file
 /// even though it is not listed as an input. Pub inserts a timestamp into
-/// the file which causes unecessary rebuilds, so instead a subset of the contents
+/// the file which causes unnecessary rebuilds, so instead a subset of the contents
 /// are used an input instead.
 class KernelSnapshot extends Target {
   const KernelSnapshot();

packages/flutter_tools/lib/src/build_system/targets/icon_tree_shaker.dart

@@ -132,7 +132,7 @@ class IconTreeShaker {
     if (fonts.length != iconData.length) {
       environment.logger.printStatus(
         'Expected to find fonts for ${iconData.keys}, but found '
-        '${fonts.keys}. This usually means you are refering to '
+        '${fonts.keys}. This usually means you are referring to '
         'font families in an IconData class but not including them '
         'in the assets section of your pubspec.yaml, are missing '
         'the package that would include them, or are missing '
@@ -219,7 +219,7 @@ class IconTreeShaker {
     return true;
   }
 
-  /// Returns a map of { fontFamly: relativePath } pairs.
+  /// Returns a map of { fontFamily: relativePath } pairs.
   Future<Map<String, String>> _parseFontJson(
     String fontManifestData,
     Set<String> families,
@@ -303,9 +303,9 @@ class IconTreeShaker {
     return _parseConstFinderResult(constFinderResult);
   }
 
-  Map<String, List<int>> _parseConstFinderResult(_ConstFinderResult consts) {
+  Map<String, List<int>> _parseConstFinderResult(_ConstFinderResult constants) {
     final Map<String, List<int>> result = <String, List<int>>{};
-    for (final Map<String, dynamic> iconDataMap in consts.constantInstances) {
+    for (final Map<String, dynamic> iconDataMap in constants.constantInstances) {
       if ((iconDataMap['fontPackage'] ?? '') is! String || // Null is ok here.
            iconDataMap['fontFamily'] is! String ||
            iconDataMap['codePoint'] is! num) {
@@ -344,7 +344,7 @@ class _ConstFinderResult {
   List<Map<String, dynamic>> get nonConstantLocations {
     _nonConstantLocations ??= _getList(
       result['nonConstantLocations'],
-      'Invalid ConstFinder output: Expected "nonConstLocations" to be a list ofobjects',
+      'Invalid ConstFinder output: Expected "nonConstLocations" to be a list of objects',
     );
     return _nonConstantLocations;
   }

packages/flutter_tools/lib/src/build_system/targets/ios.dart

@@ -187,8 +187,8 @@ class AotAssemblyProfile extends AotAssemblyBase {
 }
 
 /// Create a trivial App.framework file for debug iOS builds.
-class DebugUniveralFramework extends Target {
-  const DebugUniveralFramework();
+class DebugUniversalFramework extends Target {
+  const DebugUniversalFramework();
 
   @override
   String get name => 'debug_universal_framework';
@@ -375,7 +375,7 @@ class DebugIosApplicationBundle extends IosAssetBundle {
 
   @override
   List<Target> get dependencies => <Target>[
-    const DebugUniveralFramework(),
+    const DebugUniversalFramework(),
     ...super.dependencies,
   ];
 }

packages/flutter_tools/lib/src/build_system/targets/localizations.dart

@@ -197,7 +197,7 @@ class LocalizationOptions {
 
   /// The `--header-file` argument.
   ///
-  /// A file containing the header to preprend to the generated
+  /// A file containing the header to prepend to the generated
   /// Dart localizations.
   final Uri headerFile;
 

packages/flutter_tools/lib/src/build_system/targets/web.dart

@@ -37,7 +37,7 @@ const String kDart2jsOptimization = 'Dart2jsOptimization';
 const String kCspMode = 'cspMode';
 
 /// The caching strategy to use for service worker generation.
-const String kServiceWorkerStrategy = 'ServiceWorkerStratgey';
+const String kServiceWorkerStrategy = 'ServiceWorkerStrategy';
 
 /// Whether the dart2js build should output source maps.
 const String kSourceMapsEnabled = 'SourceMaps';
@@ -55,7 +55,7 @@ const String kOfflineFirst = 'offline-first';
 const String kNoneWorker = 'none';
 
 /// Convert a [value] into a [ServiceWorkerStrategy].
-ServiceWorkerStrategy _serviceWorkerStrategyfromString(String value) {
+ServiceWorkerStrategy _serviceWorkerStrategyFromString(String value) {
   switch (value) {
     case kNoneWorker:
       return ServiceWorkerStrategy.none;
@@ -429,7 +429,7 @@ class WebServiceWorker extends Target {
     final File serviceWorkerFile = environment.outputDir
       .childFile('flutter_service_worker.js');
     final Depfile depfile = Depfile(contents, <File>[serviceWorkerFile]);
-    final ServiceWorkerStrategy serviceWorkerStrategy = _serviceWorkerStrategyfromString(
+    final ServiceWorkerStrategy serviceWorkerStrategy = _serviceWorkerStrategyFromString(
       environment.defines[kServiceWorkerStrategy],
     );
     final String serviceWorker = generateServiceWorker(

packages/flutter_tools/lib/src/cache.dart

@@ -647,7 +647,7 @@ abstract class CachedArtifact extends ArtifactSet {
 /// Ensures that the source files for all of the dependencies for the
 /// flutter_tool are present.
 ///
-/// This does not handle cases wheere the source files are modified or the
+/// This does not handle cases where the source files are modified or the
 /// directory contents are incomplete.
 class PubDependencies extends ArtifactSet {
   PubDependencies({
@@ -1370,7 +1370,7 @@ class IosUsbArtifacts extends CachedArtifact {
 
   // For unknown reasons, users are getting into bad states where libimobiledevice is
   // downloaded but some executables are missing from the zip. The names here are
-  // used for additional download checks below, so we can redownload if they are
+  // used for additional download checks below, so we can re-download if they are
   // missing.
   static const Map<String, List<String>> _kExecutables = <String, List<String>>{
     'libimobiledevice': <String>[

packages/flutter_tools/lib/src/commands/assemble.dart

@@ -120,15 +120,15 @@ class AssembleCommand extends FlutterCommand {
 
   @override
   Future<Map<CustomDimensions, String>> get usageValues async {
-    final FlutterProject futterProject = FlutterProject.current();
-    if (futterProject == null) {
+    final FlutterProject flutterProject = FlutterProject.current();
+    if (flutterProject == null) {
       return const <CustomDimensions, String>{};
     }
     try {
       final Environment localEnvironment = createEnvironment();
       return <CustomDimensions, String>{
         CustomDimensions.commandBuildBundleTargetPlatform: localEnvironment.defines['TargetPlatform'],
-        CustomDimensions.commandBuildBundleIsModule: '${futterProject.isModule}',
+        CustomDimensions.commandBuildBundleIsModule: '${flutterProject.isModule}',
       };
     } on Exception {
       // We've failed to send usage.
@@ -285,7 +285,7 @@ void writePerformanceData(Iterable<PerformanceMeasurement> measurements, File ou
     'targets': <Object>[
       for (final PerformanceMeasurement measurement in measurements)
         <String, Object>{
-          'name': measurement.analyicsName,
+          'name': measurement.analyticsName,
           'skipped': measurement.skipped,
           'succeeded': measurement.succeeded,
           'elapsedMilliseconds': measurement.elapsedMilliseconds,

packages/flutter_tools/lib/src/commands/build_bundle.dart

@@ -79,13 +79,13 @@ class BuildBundleCommand extends BuildSubCommand {
   @override
   Future<Map<CustomDimensions, String>> get usageValues async {
     final String projectDir = globals.fs.file(targetFile).parent.parent.path;
-    final FlutterProject futterProject = FlutterProject.fromPath(projectDir);
-    if (futterProject == null) {
+    final FlutterProject flutterProject = FlutterProject.fromPath(projectDir);
+    if (flutterProject == null) {
       return const <CustomDimensions, String>{};
     }
     return <CustomDimensions, String>{
       CustomDimensions.commandBuildBundleTargetPlatform: stringArg('target-platform'),
-      CustomDimensions.commandBuildBundleIsModule: '${futterProject.isModule}',
+      CustomDimensions.commandBuildBundleIsModule: '${flutterProject.isModule}',
     };
   }
 

packages/flutter_tools/lib/src/commands/build_ios_framework.dart

@@ -82,7 +82,7 @@ class BuildIOSFrameworkCommand extends BuildSubCommand {
         help: 'Produce xcframeworks that include all valid architectures (Xcode 11 or later).',
       )
       ..addFlag('cocoapods',
-        help: 'Produce a Flutter.podspec instead of an engine Flutter.framework (recomended if host app uses CocoaPods).',
+        help: 'Produce a Flutter.podspec instead of an engine Flutter.framework (recommended if host app uses CocoaPods).',
       )
       ..addOption('output',
         abbr: 'o',

packages/flutter_tools/lib/src/commands/build_web.dart

@@ -42,7 +42,7 @@ class BuildWebCommand extends BuildSubCommand {
       defaultsTo: false,
       help: 'Whether to generate a sourcemap file. These can be used by browsers '
       'To view and debug the original source code of a compiled and minified Dart '
-      'application. Defaults to false (no sourcemaps produced).'
+      'application. Defaults to false (i.e. no sourcemaps produced).'
     );
     argParser.addOption('pwa-strategy',
       defaultsTo: kOfflineFirst,

packages/flutter_tools/lib/src/commands/doctor.dart

@@ -27,7 +27,7 @@ class DoctorCommand extends FlutterCommand {
 
   @override
   Future<Set<DevelopmentArtifact>> get requiredArtifacts async => <DevelopmentArtifact>{
-    // This is required because the gradle hostonly tests do not correctly specify
+    // This is required because the gradle host-only tests do not correctly specify
     // their dependencies.
     DevelopmentArtifact.androidGenSnapshot,
   };

packages/flutter_tools/lib/src/commands/downgrade.dart

@@ -98,9 +98,9 @@ class DowngradeCommand extends FlutterCommand {
         'to switch to an official channel.',
       );
     }
-    final String lastFlutterVesion = _persistentToolState.lastActiveVersion(channel);
+    final String lastFlutterVersion = _persistentToolState.lastActiveVersion(channel);
     final String currentFlutterVersion = _flutterVersion.frameworkRevision;
-    if (lastFlutterVesion == null || currentFlutterVersion == lastFlutterVesion) {
+    if (lastFlutterVersion == null || currentFlutterVersion == lastFlutterVersion) {
       final String trailing = await _createErrorMessage(workingDirectory, channel);
       throwToolExit(
         'There is no previously recorded version for channel "$currentChannel".\n'
@@ -108,9 +108,9 @@ class DowngradeCommand extends FlutterCommand {
       );
     }
 
-    // Detect unkown versions.
+    // Detect unknown versions.
     final RunResult parseResult = await _processUtils.run(<String>[
-      'git', 'describe', '--tags', lastFlutterVesion,
+      'git', 'describe', '--tags', lastFlutterVersion,
     ], workingDirectory: workingDirectory);
     if (parseResult.exitCode != 0) {
       throwToolExit('Failed to parse version for downgrade:\n${parseResult.stderr}');
@@ -137,7 +137,7 @@ class DowngradeCommand extends FlutterCommand {
     // so this operation is safe.
     try {
       await _processUtils.run(
-        <String>['git', 'reset', '--hard', lastFlutterVesion],
+        <String>['git', 'reset', '--hard', lastFlutterVersion],
         throwOnError: true,
         workingDirectory: workingDirectory,
       );

packages/flutter_tools/lib/src/commands/run.dart

@@ -47,7 +47,7 @@ abstract class RunCommandBase extends FlutterCommand with DeviceBasedDevelopment
       ..addFlag('dump-skp-on-shader-compilation',
         negatable: false,
         help: 'Automatically dump the skp that triggers new shader compilations. '
-            'This is useful for wrting custom ShaderWarmUp to reduce jank. '
+            'This is useful for writing custom ShaderWarmUp to reduce jank. '
             'By default, this is not enabled to reduce the overhead. '
             'This is only available in profile or debug build. ',
       )
@@ -141,7 +141,7 @@ class RunCommand extends RunCommandBase {
         help: 'Enable tracing to the endless tracer. This is useful when '
               'recording huge amounts of traces. If we need to use endless buffer to '
               'record startup traces, we can combine the ("--trace-startup"). '
-              'For exemple, flutter run --trace-startup --endless-trace-buffer. ',
+              'For example, flutter run --trace-startup --endless-trace-buffer. ',
       )
       ..addFlag('trace-systrace',
         negatable: false,

packages/flutter_tools/lib/src/commands/symbolize.dart

@@ -14,10 +14,10 @@ import '../base/io.dart';
 import '../convert.dart';
 import '../runner/flutter_command.dart';
 
-/// Support for symbolicating a Dart stack trace.
+/// Support for symbolizing a Dart stack trace.
 ///
 /// This command accepts either paths to an input file containing the
-/// stack trace and an output file for the symbolicated trace to be
+/// stack trace and an output file for the symbolizing trace to be
 /// written, or it accepts a stack trace over stdin and outputs it
 /// over stdout.
 class SymbolizeCommand extends FlutterCommand {
@@ -43,7 +43,7 @@ class SymbolizeCommand extends FlutterCommand {
     argParser.addOption(
       'output',
       abbr: 'o',
-      valueHelp: 'A file path for a symbolicated stack trace to be written to.'
+      valueHelp: 'A file path for a symbolized stack trace to be written to.'
     );
   }
 
@@ -63,7 +63,7 @@ class SymbolizeCommand extends FlutterCommand {
   @override
   Future<void> validateCommand() {
     if (!argResults.wasParsed('debug-info')) {
-      throwToolExit('"--debug-info" is required to symbolicate stack traces.');
+      throwToolExit('"--debug-info" is required to symbolize stack traces.');
     }
     if (!_fileSystem.isFileSync(stringArg('debug-info'))) {
       throwToolExit('${stringArg('debug-info')} does not exist.');

packages/flutter_tools/lib/src/commands/update_packages.dart

@@ -518,7 +518,7 @@ enum DependencyKind {
   // "sdk" dependency in the dependency_overrides section.
   overridden,
 
-  // A depdendency that uses git.
+  // A dependency that uses git.
   git,
 }
 
@@ -812,7 +812,7 @@ class PubspecYaml {
             // Since we're in one of the places where we can list dependencies,
             // remember this as the current last known valid place to insert our
             // transitive dev dependencies. If the section is for regular dependencies,
-            // then also rememeber the line for the end of direct dependencies.
+            // then also remember the line for the end of direct dependencies.
             if (section == Section.dependencies) {
               endOfDirectDependencies = output.length;
             }

packages/flutter_tools/lib/src/commands/upgrade.dart

@@ -37,7 +37,7 @@ class UpgradeCommand extends FlutterCommand {
       ..addOption(
         'working-directory',
         hide: true,
-        help: 'Override the upgrade working directoy for integration testing.'
+        help: 'Override the upgrade working directory for integration testing.'
       );
   }
 
@@ -124,7 +124,7 @@ class UpgradeCommandRunner {
     }
     // If there are uncommitted changes we might be on the right commit but
     // we should still warn.
-    if (!force && await hasUncomittedChanges()) {
+    if (!force && await hasUncommittedChanges()) {
       throwToolExit(
         'Your flutter checkout has local changes that would be erased by '
         'upgrading. If you want to keep these changes, it is recommended that '
@@ -178,7 +178,7 @@ class UpgradeCommandRunner {
     globals.persistentToolState.redisplayWelcomeMessage = true;
   }
 
-  Future<bool> hasUncomittedChanges() async {
+  Future<bool> hasUncommittedChanges() async {
     try {
       final RunResult result = await processUtils.run(
         <String>['git', 'status', '-s'],

packages/flutter_tools/lib/src/compile.dart

@@ -866,7 +866,7 @@ class DefaultResidentCompiler implements ResidentCompiler {
   }
 }
 
-/// Convert a file URI into a multiroot scheme URI if provided, otherwise
+/// Convert a file URI into a multi-root scheme URI if provided, otherwise
 /// return unmodified.
 @visibleForTesting
 String toMultiRootPath(Uri fileUri, String scheme, List<String> fileSystemRoots, bool windows) {

packages/flutter_tools/lib/src/devfs.dart

@@ -242,7 +242,7 @@ class _DevFSHttpWriter implements DevFSWriter {
   final String fsName;
   final Uri httpAddress;
 
-  // 3 was chosen to try to limit the varience in the time it takes to execute
+  // 3 was chosen to try to limit the variance in the time it takes to execute
   // `await request.close()` since there is a known bug in Dart where it doesn't
   // always return a status code in response to a PUT request:
   // https://github.com/dart-lang/sdk/issues/43525.

packages/flutter_tools/lib/src/device.dart

@@ -81,7 +81,7 @@ class PlatformType {
   String toString() => value;
 }
 
-/// A disovery mechanism for flutter-supported development devices.
+/// A discovery mechanism for flutter-supported development devices.
 abstract class DeviceManager {
   DeviceManager({
     @required Logger logger,
@@ -238,7 +238,7 @@ abstract class DeviceManager {
 
     // Always remove web and fuchsia devices from `--all`. This setting
     // currently requires devices to share a frontend_server and resident
-    // runnner instance. Both web and fuchsia require differently configured
+    // runner instance. Both web and fuchsia require differently configured
     // compilers, and web requires an entirely different resident runner.
     if (hasSpecifiedAllDevices) {
       devices = <Device>[
@@ -270,7 +270,7 @@ abstract class DeviceManager {
     // If there are still multiple devices and the user did not specify to run
     // all, then attempt to prioritize ephemeral devices. For example, if the
     // user only typed 'flutter run' and both an Android device and desktop
-    // device are availible, choose the Android device.
+    // device are available, choose the Android device.
     if (devices.length > 1 && !hasSpecifiedAllDevices) {
       // Note: ephemeral is nullable for device types where this is not well
       // defined.
@@ -626,7 +626,7 @@ abstract class Device {
   /// Create a platform-specific [DevFSWriter] for the given [app], or
   /// null if the device does not support them.
   ///
-  /// For example, the destkop device classes can use a writer which
+  /// For example, the desktop device classes can use a writer which
   /// copies the files across the local file system.
   DevFSWriter createDevFSWriter(
     covariant ApplicationPackage app,
@@ -685,7 +685,7 @@ abstract class Device {
   bool get supportsHotRestart => true;
 
   /// Whether flutter applications running on this device can be terminated
-  /// from the vmservice.
+  /// from the VM Service.
   bool get supportsFlutterExit => true;
 
   /// Whether the device supports taking screenshots of a running flutter
@@ -938,7 +938,7 @@ class DebuggingOptions {
   /// Enable expression evaluation for web target.
   final bool webEnableExpressionEvaluation;
 
-  /// A file where the vmservice URL should be written after the application is started.
+  /// A file where the VM Service URL should be written after the application is started.
   final String vmserviceOutFile;
   final bool fastStart;
 
@@ -1053,7 +1053,7 @@ class NoOpDeviceLogReader implements DeviceLogReader {
   void dispose() { }
 }
 
-// A portforwarder which does not support forwarding ports.
+// A port forwarder which does not support forwarding ports.
 class NoOpDevicePortForwarder implements DevicePortForwarder {
   const NoOpDevicePortForwarder();
 

packages/flutter_tools/lib/src/doctor.dart

@@ -596,7 +596,7 @@ class ValidationResult {
 /// on the cause and/or solution to the validation failure.
 @immutable
 class ValidationMessage {
-  /// Create a validation message with information for a passing validatior.
+  /// Create a validation message with information for a passing validator.
   ///
   /// By default this is not displayed unless the doctor is run in
   /// verbose mode.
@@ -663,7 +663,7 @@ class ValidationMessage {
   int get hashCode => type.hashCode ^ message.hashCode ^ contextUrl.hashCode;
 }
 
-/// A validator that checks the version of Flutter, as well as some auxillary information
+/// A validator that checks the version of Flutter, as well as some auxiliary information
 /// such as the pub or Flutter cache overrides.
 ///
 /// This is primarily useful for diagnosing issues on Github bug reports by displaying

packages/flutter_tools/lib/src/emulator.dart

@@ -237,7 +237,7 @@ abstract class EmulatorDiscovery {
   /// Whether this emulator discovery is capable of listing any emulators.
   bool get canListAnything;
 
-  /// Whether this emulator discovery is capabale of launching new emulators.
+  /// Whether this emulator discovery is capable of launching new emulators.
   bool get canLaunchAnything;
 
   Future<List<Emulator>> get emulators;

packages/flutter_tools/lib/src/fuchsia/fuchsia_device.dart

@@ -320,7 +320,7 @@ class FuchsiaDevice extends Device {
       }
       packageRepo.createSync(recursive: true);
     } on Exception catch (e) {
-      globals.printError('Failed to create Fuchisa package repo directory '
+      globals.printError('Failed to create Fuchsia package repo directory '
                  'at ${packageRepo.path}: $e');
       return LaunchResult.failed();
     }
@@ -440,7 +440,7 @@ class FuchsiaDevice extends Device {
     }
 
     if (debuggingOptions.buildInfo.mode.isRelease) {
-      globals.printTrace('App succesfully started in a release mode.');
+      globals.printTrace('App successfully started in a release mode.');
       return LaunchResult.succeeded();
     }
     globals.printTrace('App started in a non-release mode. Setting up vmservice connection.');

packages/flutter_tools/lib/src/fuchsia/fuchsia_kernel_compiler.dart

@@ -38,7 +38,7 @@ class FuchsiaKernelCompiler {
       mode: buildInfo.mode,
     );
     if (!globals.fs.isFileSync(kernelCompiler)) {
-      throwToolExit('Fuchisa kernel compiler not found at "$kernelCompiler"');
+      throwToolExit('Fuchsia kernel compiler not found at "$kernelCompiler"');
     }
     final String platformDill = globals.artifacts.getArtifactPath(
       Artifact.platformKernelDill,
@@ -46,7 +46,7 @@ class FuchsiaKernelCompiler {
       mode: buildInfo.mode,
     );
     if (!globals.fs.isFileSync(platformDill)) {
-      throwToolExit('Fuchisa platform file not found at "$platformDill"');
+      throwToolExit('Fuchsia platform file not found at "$platformDill"');
     }
     List<String> flags = <String>[
       '--target', 'flutter_runner',

packages/flutter_tools/lib/src/fuchsia/fuchsia_pm.dart

@@ -76,7 +76,7 @@ class FuchsiaPM {
   /// When successful, creates a file `app_name-0.far` under [buildPath], which
   /// is the Fuchsia package.
   ///
-  /// [buildPath] should be the same path passed to [init], and [manfiestPath]
+  /// [buildPath] should be the same path passed to [init], and [manifestPath]
   /// should be the same manifest passed to [build].
   Future<bool> archive(String buildPath, String keyPath, String manifestPath) {
     return _runPMCommand(<String>[

packages/flutter_tools/lib/src/intellij/intellij_validator.dart

@@ -251,9 +251,9 @@ class IntelliJValidatorOnMac extends IntelliJValidator {
       for (final Directory dir in installDirs) {
         checkForIntelliJ(dir);
         if (!dir.path.endsWith('.app')) {
-          for (final FileSystemEntity subdir in dir.listSync()) {
-            if (subdir is Directory) {
-              checkForIntelliJ(subdir);
+          for (final FileSystemEntity subdirectory in dir.listSync()) {
+            if (subdirectory is Directory) {
+              checkForIntelliJ(subdirectory);
             }
           }
         }

packages/flutter_tools/lib/src/ios/devices.dart

@@ -887,7 +887,7 @@ class IOSDevicePortForwarder extends DevicePortForwarder {
     while (!connected) {
       _logger.printTrace('Attempting to forward device port $devicePort to host port $hostPort');
       process = await _iproxy.forward(devicePort, hostPort, _id);
-      // TODO(ianh): This is a flakey race condition, https://github.com/libimobiledevice/libimobiledevice/issues/674
+      // TODO(ianh): This is a flaky race condition, https://github.com/libimobiledevice/libimobiledevice/issues/674
       connected = !await process.stdout.isEmpty.timeout(_kiProxyPortForwardTimeout, onTimeout: () => false);
       if (!connected) {
         process.kill();
@@ -919,7 +919,7 @@ class IOSDevicePortForwarder extends DevicePortForwarder {
       return;
     }
 
-    _logger.printTrace('Unforwarding port $forwardedPort');
+    _logger.printTrace('Un-forwarding port $forwardedPort');
     forwardedPort.dispose();
   }
 

packages/flutter_tools/lib/src/ios/xcodeproj.dart

@@ -502,7 +502,7 @@ class XcodeProjectInfo {
 
   /// Checks whether the [buildConfigurations] contains the specified string, without
   /// regard to case.
-  bool hasBuildConfiguratinForBuildMode(String buildMode) {
+  bool hasBuildConfigurationForBuildMode(String buildMode) {
     buildMode = buildMode.toLowerCase();
     for (final String name in buildConfigurations) {
       if (name.toLowerCase() == buildMode) {
@@ -537,7 +537,7 @@ class XcodeProjectInfo {
   /// null, if there is no unique best match.
   String buildConfigurationFor(BuildInfo buildInfo, String scheme) {
     final String expectedConfiguration = expectedBuildConfigurationFor(buildInfo, scheme);
-    if (hasBuildConfiguratinForBuildMode(expectedConfiguration)) {
+    if (hasBuildConfigurationForBuildMode(expectedConfiguration)) {
       return expectedConfiguration;
     }
     final String baseConfiguration = _baseConfigurationFor(buildInfo);

packages/flutter_tools/lib/src/isolated/devfs_web.dart

@@ -431,7 +431,7 @@ class WebAssetServer implements AssetReader {
 
     final int length = file.lengthSync();
     // Attempt to determine the file's mime type. if this is not provided some
-    // browsers will refuse to render images/show video et cetera. If the tool
+    // browsers will refuse to render images/show video etc. If the tool
     // cannot determine a mime type, fall back to application/octet-stream.
     String mimeType;
     if (length >= 12) {
@@ -544,7 +544,7 @@ class WebAssetServer implements AssetReader {
     return modules;
   }
 
-  /// Whether to use the cavaskit SDK for rendering.
+  /// Whether to use the canvaskit SDK for rendering.
   bool canvasKitRendering = false;
 
   shelf.Response _serveIndex() {
@@ -864,9 +864,9 @@ class WebDevFS implements DevFS {
     }
 
     // The tool generates an entrypoint file in a temp directory to handle
-    // the web specific bootrstrap logic. To make it easier for DWDS to handle
+    // the web specific bootstrap logic. To make it easier for DWDS to handle
     // mapping the file name, this is done via an additional file root and
-    // specicial hard-coded scheme.
+    // special hard-coded scheme.
     final CompilerOutput compilerOutput = await generator.recompile(
       Uri(
         scheme: 'org-dartlang-app',

packages/flutter_tools/lib/src/localizations/gen_l10n_types.dart

@@ -104,7 +104,7 @@ const Set<String> _validNumberFormats = <String>{
 // The names of the NumberFormat factory constructors which have named
 // parameters rather than positional parameters.
 //
-// This helps the tool correctly generate number formmatting code correctly.
+// This helps the tool correctly generate number formatting code correctly.
 //
 // Example of code that uses named parameters:
 // final NumberFormat format = NumberFormat.compact(
@@ -176,7 +176,7 @@ class OptionalParameter {
 // Each placeholder can optionally specify a valid Dart type. If the type
 // is NumberFormat or DateFormat then a format which matches one of the
 // type's factory constructors can also be specified. In this example the
-// date placeholder is to be formated with DateFormat.yMMMMd:
+// date placeholder is to be formatted with DateFormat.yMMMMd:
 //
 // "helloWorldOn": "Hello World on {date}",
 // "@helloWorldOn": {

packages/flutter_tools/lib/src/localizations/localizations_utils.dart

@@ -238,7 +238,7 @@ String describeLocale(String tag) {
   return output;
 }
 
-/// Return the input string as a Dart-parseable string.
+/// Return the input string as a Dart-parsable string.
 ///
 /// ```
 /// foo => 'foo'

packages/flutter_tools/lib/src/macos/cocoapods.dart

@@ -67,7 +67,7 @@ enum CocoaPodsStatus {
   brokenInstall,
 }
 
-/// Cocoapods is a depenency management solution for iOS and macOS applications.
+/// Cocoapods is a dependency management solution for iOS and macOS applications.
 ///
 /// Cocoapods is generally installed via ruby gems and interacted with via
 /// the `pod` CLI command.

packages/flutter_tools/lib/src/macos/macos_device.dart

@@ -77,7 +77,7 @@ class MacOSDevice extends DesktopDevice {
   void onAttached(covariant MacOSApp package, BuildMode buildMode, Process process) {
     // Bring app to foreground. Ideally this would be done post-launch rather
     // than post-attach, since this won't run for release builds, but there's
-    // no general-purpose way of knowing when a process is far enoug along in
+    // no general-purpose way of knowing when a process is far enough along in
     // the launch process for 'open' to foreground it.
     _processManager.run(<String>[
       'open', package.applicationBundle(buildMode),

packages/flutter_tools/lib/src/macos/macos_workflow.dart

@@ -10,9 +10,6 @@ import '../features.dart';
 
 
 /// The macOS-specific implementation of a [Workflow].
-///
-/// This workflow requires the flutter-desktop-embedding as a sibling
-/// repository to the flutter repo.
 class MacOSWorkflow implements Workflow {
   const MacOSWorkflow({
     @required Platform platform,

packages/flutter_tools/lib/src/platform_plugins.dart

@@ -14,7 +14,7 @@ const String kPluginClass = 'pluginClass';
 /// Constant for 'pluginClass' key in plugin maps.
 const String kDartPluginClass = 'dartPluginClass';
 
-/// Marker interface for all platform specific plugin config impls.
+/// Marker interface for all platform specific plugin config implementations.
 abstract class PluginPlatform {
   const PluginPlatform();
 

packages/flutter_tools/lib/src/plugins.dart

@@ -937,7 +937,7 @@ Future<void> _writeIOSPluginRegistrant(FlutterProject project, List<Plugin> plug
 /// that file, rather than the generated file.
 String _cmakeRelativePluginSymlinkDirectoryPath(CmakeBasedProject project) {
   final String makefileDirPath = project.cmakeFile.parent.absolute.path;
-  // CMake alway uses posix-style path separators, regardless of the platform.
+  // CMake always uses posix-style path separators, regardless of the platform.
   final path.Context cmakePathContext = path.Context(style: path.Style.posix);
   final List<String> relativePathComponents = globals.fs.path.split(globals.fs.path.relative(
     project.pluginSymlinkDirectory.absolute.path,

packages/flutter_tools/lib/src/project.dart

@@ -343,7 +343,7 @@ abstract class CmakeBasedProject {
   /// the build.
   File get generatedCmakeConfigFile;
 
-  /// Includable CMake with rules and variables for plugin builds.
+  /// Included CMake with rules and variables for plugin builds.
   File get generatedPluginCmakeFile;
 
   /// The directory to write plugin symlinks.

packages/flutter_tools/lib/src/resident_runner.dart

@@ -328,7 +328,7 @@ class FlutterDevice {
     return vmService.onDone
       .catchError((dynamic error, StackTrace stackTrace) {
         globals.logger.printError(
-          'unhanlded error waiting for vm service exit:\n $error',
+          'unhandled error waiting for vm service exit:\n $error',
           stackTrace: stackTrace,
          );
       })
@@ -1083,7 +1083,7 @@ abstract class ResidentRunner {
   /// If the device has a connected vmservice, this method will attempt to hide
   /// and restore the debug banner before taking the screenshot.
   ///
-  /// Throws an [AssertionError] if [Devce.supportsScreenshot] is not true.
+  /// Throws an [AssertionError] if [Device.supportsScreenshot] is not true.
   Future<void> screenshot(FlutterDevice device) async {
     assert(device.device.supportsScreenshot);
 

packages/flutter_tools/lib/src/run_hot.dart

@@ -536,7 +536,7 @@ class HotRunner extends ResidentRunner {
 
       // The engine handles killing and recreating isolates that it has spawned
       // ("uiIsolates"). The isolates that were spawned from these uiIsolates
-      // will not be restared, and so they must be manually killed.
+      // will not be restarted, and so they must be manually killed.
       final vm_service.VM vm = await device.vmService.getVM();
       for (final vm_service.IsolateRef isolateRef in vm.isolates) {
         if (uiIsolatesIds.contains(isolateRef.id)) {
@@ -570,7 +570,7 @@ class HotRunner extends ResidentRunner {
         try {
           await device.vmService.streamListen('Isolate');
         } on vm_service.RPCError {
-          // Do nothing, we're already subcribed.
+          // Do nothing, we're already subscribed.
         }
         isolateNotifications.add(
           device.vmService.onIsolateEvent.firstWhere((vm_service.Event event) {

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -553,7 +553,7 @@ abstract class FlutterCommand extends Command<void> {
     argParser.addFlag(FlutterOptions.kNullAssertions,
       help:
         'Perform additional null assertions on the boundaries of migrated and '
-        'unmigrated code. This setting is not currently supported on desktop '
+        'un-migrated code. This setting is not currently supported on desktop '
         'devices.'
     );
   }
@@ -598,7 +598,7 @@ abstract class FlutterCommand extends Command<void> {
       FlutterOptions.kPerformanceMeasurementFile,
       help:
         'The name of a file where flutter assemble performance and '
-        'cachedness information will be written in a JSON format.'
+        'cached-ness information will be written in a JSON format.'
     );
   }
 
@@ -1186,7 +1186,7 @@ mixin TargetPlatformBasedDevelopmentArtifacts on FlutterCommand {
   @override
   Future<Set<DevelopmentArtifact>> get requiredArtifacts async {
     // If there is no specified target device, fallback to the default
-    // confiugration.
+    // configuration.
     final String rawTargetPlatform = stringArg('target-platform');
     final TargetPlatform targetPlatform = getTargetPlatformForName(rawTargetPlatform);
     if (targetPlatform == null) {

packages/flutter_tools/lib/src/test/coverage_collector.dart

@@ -279,7 +279,7 @@ void _buildCoverageMap(
       final List<int> hits = (coverage['hits'] as List<dynamic>).cast<int>();
       final List<int> misses = (coverage['misses'] as List<dynamic>).cast<int>();
       final List<dynamic> tokenPositions = scripts[scriptRef['id']]['tokenPosTable'] as List<dynamic>;
-      // The token positions can be null if the script has no coverable lines.
+      // The token positions can be null if the script has no lines that may be covered.
       if (tokenPositions == null) {
         continue;
       }

packages/flutter_tools/lib/src/version.dart

@@ -77,7 +77,7 @@ class FlutterVersion {
     _frameworkVersion = gitTagVersion.frameworkVersionFor(_frameworkRevision);
   }
 
-  /// Fetchs tags from the upstream Flutter repository and re-calculates the
+  /// Fetches tags from the upstream Flutter repository and re-calculates the
   /// version.
   ///
   /// This carries a performance penalty, and should only be called when the
@@ -259,7 +259,7 @@ class FlutterVersion {
       );
     } on VersionCheckError catch (error) {
       if (globals.platform.environment.containsKey('FLUTTER_GIT_URL')) {
-        globals.logger.printError('Warning: the Flutter git upstream was overriden '
+        globals.logger.printError('Warning: the Flutter git upstream was overridden '
         'by the environment variable FLUTTER_GIT_URL = $_flutterGit');
       }
       globals.logger.printError(error.toString());

packages/flutter_tools/lib/src/vmservice.dart

@@ -421,10 +421,10 @@ extension FlutterVmService on vm_service.VmService {
       });
   }
 
-  /// Retreive the cached SkSL shaders from an attached Flutter view.
+  /// Retrieve the cached SkSL shaders from an attached Flutter view.
   ///
   /// This method will only return data if `--cache-sksl` was provided as a
-  /// flutter run agument, and only then on physical devices.
+  /// flutter run argument, and only then on physical devices.
   Future<Map<String, Object>> getSkSLs({
     @required String viewId,
   }) async {
@@ -437,7 +437,7 @@ extension FlutterVmService on vm_service.VmService {
     return response.json['SkSLs'] as Map<String, Object>;
   }
 
-  /// Flush all tasks on the UI thead for an attached Flutter view.
+  /// Flush all tasks on the UI thread for an attached Flutter view.
   ///
   /// This method is currently used only for benchmarking.
   Future<void> flushUIThreadTasks({
@@ -809,7 +809,7 @@ Future<String> sharedSkSlWriter(Device device, Map<String, Object> data, {
 }) async {
   if (data.isEmpty) {
     globals.logger.printStatus(
-      'No data was receieved. To ensure SkSL data can be generated use a '
+      'No data was received. To ensure SkSL data can be generated use a '
       'physical device then:\n'
       '  1. Pass "--cache-sksl" as an argument to flutter run.\n'
       '  2. Interact with the application to force shaders to be compiled.\n'

packages/flutter_tools/lib/src/web/bootstrap.dart

@@ -52,6 +52,7 @@ String generateMainModule({
   @required String entrypoint,
   @required bool nullAssertions,
 }) {
+  // TODO(jonahwilliams): fix typo in dwds and update.
   return '''/* ENTRYPOINT_EXTENTION_MARKER */
 // Create the main module loaded below.
 define("main_module.bootstrap", ["$entrypoint", "dart_sdk"], function(app, dart_sdk) {

packages/flutter_tools/lib/src/web/chrome.dart

@@ -162,13 +162,13 @@ class ChromiumLauncher {
 
   /// Launch a Chromium browser to a particular `host` page.
   ///
-  /// `headless` defaults to false, and controls whether we open a headless or
-  /// a `headfull` browser.
+  /// [headless] defaults to false, and controls whether we open a headless or
+  /// a "headfull" browser.
   ///
-  /// `debugPort` is Chrome's debugging protocol port. If null, a random free
+  /// [debugPort] is Chrome's debugging protocol port. If null, a random free
   /// port is picked automatically.
   ///
-  /// `skipCheck` does not attempt to make a devtools connection before returning.
+  /// [skipCheck] does not attempt to make a devtools connection before returning.
   Future<Chromium> launch(String url, {
     bool headless = false,
     int debugPort,

packages/flutter_tools/lib/src/web/web_validator.dart

@@ -8,7 +8,7 @@ import '../base/platform.dart';
 import '../doctor.dart';
 import 'chrome.dart';
 
-/// A validator for Chromium-based brosers.
+/// A validator for Chromium-based browsers.
 abstract class ChromiumValidator extends DoctorValidator {
   const ChromiumValidator(String title) : super(title);
 
@@ -19,25 +19,25 @@ abstract class ChromiumValidator extends DoctorValidator {
   @override
   Future<ValidationResult> validate() async {
     final bool canRunChromium = _chromiumLauncher.canFindExecutable();
-    final String chromimSearchLocation = _chromiumLauncher.findExecutable();
+    final String chromiumSearchLocation = _chromiumLauncher.findExecutable();
     final List<ValidationMessage> messages = <ValidationMessage>[
       if (_platform.environment.containsKey(kChromeEnvironment))
         if (!canRunChromium)
-          ValidationMessage.hint('$chromimSearchLocation is not executable.')
+          ValidationMessage.hint('$chromiumSearchLocation is not executable.')
         else
-          ValidationMessage('$kChromeEnvironment = $chromimSearchLocation')
+          ValidationMessage('$kChromeEnvironment = $chromiumSearchLocation')
       else
         if (!canRunChromium)
           ValidationMessage.hint('Cannot find $_name. Try setting '
             '$kChromeEnvironment to a $_name executable.')
         else
-          ValidationMessage('$_name at $chromimSearchLocation'),
+          ValidationMessage('$_name at $chromiumSearchLocation'),
     ];
     if (!canRunChromium) {
       return ValidationResult(
         ValidationType.missing,
         messages,
-        statusInfo: 'Cannot find $_name executable at $chromimSearchLocation',
+        statusInfo: 'Cannot find $_name executable at $chromiumSearchLocation',
       );
     }
     return ValidationResult(
@@ -66,7 +66,7 @@ class ChromeValidator extends ChromiumValidator {
   String get _name => 'Chrome';
 }
 
-/// A validator that checks whethere Edge is installed and can run.
+/// A validator that checks whether Edge is installed and can run.
 class EdgeValidator extends ChromiumValidator {
   const EdgeValidator({
     @required Platform platform,

packages/flutter_tools/lib/src/windows/build_windows.dart

@@ -36,7 +36,7 @@ Future<void> buildWindows(WindowsProject windowsProject, BuildInfo buildInfo, {
       'to learn about adding Windows support to a project.');
   }
 
-  // Ensure that necessary emphemeral files are generated and up to date.
+  // Ensure that necessary ephemeral files are generated and up to date.
   _writeGeneratedFlutterConfig(windowsProject, buildInfo, target);
   createPluginSymlinks(windowsProject.parent);
 

packages/flutter_tools/lib/src/windows/visual_studio.dart

@@ -140,7 +140,7 @@ class VisualStudio {
     return _requiredComponents().values.toList();
   }
 
-  /// The consumer-facing version name of the minumum supported version.
+  /// The consumer-facing version name of the minimum supported version.
   ///
   /// E.g., for Visual Studio 2019 this returns "2019" rather than "16".
   String get minimumVersionDescription {
@@ -199,7 +199,7 @@ class VisualStudio {
   Map<String, String> _requiredComponents([int majorVersion]) {
     // The description of the C++ toolchain required by the template. The
     // component name is significantly different in different versions.
-    // When a new major version of VS is supported, its toochain description
+    // When a new major version of VS is supported, its toolchain description
     // should be added below. It should also be made the default, so that when
     // there is no installation, the message shows the string that will be
     // relevant for the most likely fresh install case).
@@ -228,7 +228,7 @@ class VisualStudio {
   /// The minimum supported major version.
   static const int _minimumSupportedVersion = 16;  // '16' is VS 2019.
 
-  /// vswhere argument to specificy the minimum version.
+  /// vswhere argument to specify the minimum version.
   static const String _vswhereMinVersionArgument = '-version';
 
   /// vswhere argument to allow prerelease versions.
@@ -304,7 +304,7 @@ class VisualStudio {
         }
       }
     } on ArgumentError {
-      // Thrown if vswhere doesnt' exist; ignore and return null below.
+      // Thrown if vswhere doesn't exist; ignore and return null below.
     } on ProcessException {
       // Ignored, return null below.
     } on FormatException {

packages/flutter_tools/test/commands.shard/hermetic/assemble_test.dart

@@ -106,7 +106,7 @@ void main() {
         return BuildResult(success: true, performance: <String, PerformanceMeasurement>{
           'hello': PerformanceMeasurement(
             target: 'hello',
-            analyicsName: 'bar',
+            analyticsName: 'bar',
             elapsedMilliseconds: 123,
             skipped: false,
             succeeded: true,
@@ -208,7 +208,7 @@ void main() {
   testWithoutContext('writePerformanceData outputs performance data in JSON form', () {
     final List<PerformanceMeasurement> performanceMeasurement = <PerformanceMeasurement>[
       PerformanceMeasurement(
-        analyicsName: 'foo',
+        analyticsName: 'foo',
         target: 'hidden',
         skipped: false,
         succeeded: true,

packages/flutter_tools/test/commands.shard/hermetic/symbolize_test.dart

@@ -63,7 +63,7 @@ void main() {
     final Future<void> result = createTestCommandRunner(command)
       .run(const <String>['symbolize']);
 
-    expect(result, throwsToolExit(message: '"--debug-info" is required to symbolicate stack traces.'));
+    expect(result, throwsToolExit(message: '"--debug-info" is required to symbolize stack traces.'));
   });
 
   testUsingContext('symbolize exits when --debug-info file is missing', () async {

packages/flutter_tools/test/commands.shard/permeable/upgrade_test.dart

@@ -369,7 +369,7 @@ class FakeUpgradeCommandRunner extends UpgradeCommandRunner {
   Future<String> fetchRemoteRevision() async => remoteRevision;
 
   @override
-  Future<bool> hasUncomittedChanges() async => willHaveUncomittedChanges;
+  Future<bool> hasUncommittedChanges() async => willHaveUncomittedChanges;
 
   @override
   Future<void> upgradeChannel(FlutterVersion flutterVersion) async {}

packages/flutter_tools/test/general.shard/build_system/targets/ios_test.dart

@@ -115,7 +115,7 @@ void main() {
       ]),
     ]);
 
-    await const DebugUniveralFramework().build(environment);
+    await const DebugUniversalFramework().build(environment);
   }, overrides: <Type, Generator>{
     FileSystem: () => fileSystem,
     ProcessManager: () => processManager,

packages/flutter_tools/test/general.shard/commands/build_aot_test.dart

@@ -116,14 +116,14 @@ void main() {
       .thenAnswer((Invocation invocation) async {
         return BuildResult(success: true, performance: <String, PerformanceMeasurement>{
           'kernel_snapshot': PerformanceMeasurement(
-            analyicsName: 'kernel_snapshot',
+            analyticsName: 'kernel_snapshot',
             target: 'kernel_snapshot',
             elapsedMilliseconds: 1000,
             succeeded: true,
             skipped: false,
           ),
           'anything': PerformanceMeasurement(
-            analyicsName: 'android_aot',
+            analyticsName: 'android_aot',
             target: 'anything',
             elapsedMilliseconds: 1000,
             succeeded: true,

packages/flutter_tools/test/general.shard/resident_runner_test.dart

@@ -1457,7 +1457,7 @@ void main() {
     ]);
     await residentRunner.writeSkSL();
 
-    expect(testLogger.statusText, contains('No data was receieved'));
+    expect(testLogger.statusText, contains('No data was received'));
     expect(fakeVmServiceHost.hasRemainingExpectations, false);
   }));