Run dartfmt on all files under runtime.

runtime/observatory/lib/src/cli/command.dart

Index: runtime/observatory/lib/src/cli/command.dart
diff --git a/runtime/observatory/lib/src/cli/command.dart b/runtime/observatory/lib/src/cli/command.dart
index 6030aef8ca6e96830bad98739e269fa1be85677f..a0d8fa180ffca53be023cbabfce8615b925ce160 100644
--- a/runtime/observatory/lib/src/cli/command.dart
+++ b/runtime/observatory/lib/src/cli/command.dart
@@ -253,8 +253,7 @@ abstract class Command extends _CommandBase {
   toString() => 'Command(${name})';
 }
 
-abstract class CommandException implements Exception {
-}
+abstract class CommandException implements Exception {}
 
 class AmbiguousCommandException extends CommandException {
   AmbiguousCommandException(this.command, this.matches);
@@ -264,8 +263,8 @@ class AmbiguousCommandException extends CommandException {
 
   @override
   String toString() {
-    List<String> matchNames = matches.map(
-        (Command command) => '${command.fullName}').toList();
+    List<String> matchNames =
+        matches.map((Command command) => '${command.fullName}').toList();
     return "Command '$command' is ambiguous: $matchNames";
   }
 }