increase the port check iteration count (#6301)

.idea/.name

-Flutter
+flutter
\ No newline at end of file

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

@@ -11,7 +11,7 @@ import 'package:path/path.dart' as path;
 export 'package:file/io.dart';
 export 'package:file/sync_io.dart';
 
-/// Currently active implmenetation of the file system.
+/// Currently active implementation of the file system.
 ///
 /// By default it uses local disk-based implementation. Override this in tests
 /// with [MemoryFileSystem].

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

@@ -124,7 +124,7 @@ Future<int> findAvailablePort() async {
   return port;
 }
 
-const int _kMaxSearchIterations = 5;
+const int _kMaxSearchIterations = 20;
 
 /// This method will attempt to return a port close to or the same as
 /// [defaultPort]. Failing that, it will return any available port.

packages/flutter_tools/lib/src/hot.dart

@@ -483,8 +483,8 @@ class HotRunner extends ResidentRunner {
       int errorCode = error['code'];
       if (errorCode == Isolate.kIsolateReloadBarred) {
         printError('Unable to hot reload app due to an unrecoverable error in '
-                   'the source code. Please address the error and then '
-                   'Use "R" to restart the app.');
+                   'the source code. Please address the error and then use '
+                   '"R" to restart the app.');
         flutterUsage.sendEvent('hot', 'reload-barred');
         return false;
       }