Prettier help in tool (#6637)

packages/flutter_tools/lib/src/hot.dart

@@ -549,7 +549,7 @@ class HotRunner extends ResidentRunner {
 
   @override
   void printHelp({ @required bool details }) {
-    printStatus('To hot reload your app on the fly, press "r" or F5. To restart the app entirely, press "R".', emphasis: true);
+    printStatus('🔥  To hot reload your app on the fly, press "r" or F5. To restart the app entirely, press "R".', emphasis: true);
     printStatus('The Observatory debugger and profiler is available at: http://127.0.0.1:$_observatoryPort/');
     if (details) {
       printStatus('To dump the widget hierarchy of the app (debugDumpApp), press "w".');

packages/flutter_tools/lib/src/resident_runner.dart

@@ -176,9 +176,10 @@ abstract class ResidentRunner {
 
   void setupTerminal() {
     if (usesTerminalUI) {
-      if (!logger.quiet)
+      if (!logger.quiet) {
+        printStatus('');
         printHelp(details: false);
-
+      }
       terminal.singleCharMode = true;
       terminal.onCharInput.listen((String code) {
         processTerminalInput(code);

packages/flutter_tools/lib/src/run.dart

@@ -262,20 +262,22 @@ class RunAndStayResident extends ResidentRunner {
 
   @override
   void printHelp({ @required bool details }) {
-    final bool showRestartText = !prebuiltMode && device.supportsRestart &&
-        supportsServiceProtocol;
-    if (showRestartText)
+    bool haveDetails = false;
+    if (!prebuiltMode && device.supportsRestart && supportsServiceProtocol)
       printStatus('To restart the app, press "r" or F5.');
     if (_result.hasObservatory)
       printStatus('The Observatory debugger and profiler is available at: http://127.0.0.1:${_result.observatoryPort}/');
-    if (details) {
-      if (supportsServiceProtocol) {
+    if (supportsServiceProtocol) {
+      haveDetails = true;
+      if (details) {
         printStatus('To dump the widget hierarchy of the app (debugDumpApp), press "w".');
         printStatus('To dump the rendering tree of the app (debugDumpRenderTree), press "r".');
       }
-      printStatus('To repeat this help message, press "h" or F1. To quit, press "q", F10, or Ctrl-C.');
-    } else {
+    }
+    if (haveDetails && !details) {
       printStatus('For a more detailed help message, press "h" or F1. To quit, press "q", F10, or Ctrl-C.');
+    } else {
+      printStatus('To repeat this help message, press "h" or F1. To quit, press "q", F10, or Ctrl-C.');
     }
   }