Allow Observatory debugger to switch isolates.

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

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of cli;
 
 // Splits a line into a list of string args.  Each arg retains any
 // trailing whitespace so that we can reconstruct the original command
 // line from the pieces.
 List<String> _splitLine(String line) {
@@ skipping 131 matching lines @@
         // argument completion from the command.
         return commands[0]._buildCompletions(args, true);
       } else {
         // An ambiguous prefix match leaves us nowhere.  The user is
         // typing a bunch of stuff that we don't know how to complete.
         return new Future.value([]);
       }
     }
 
     // We have found a set of commands which match all of the args.
-    // Return the completions strings.
+    // Return the completion strings.
     var prefix = _concatArgs(args, args.length - 1);
     var completions =
         commands.map((command) => '${prefix}${command.name} ').toList();
-    if (showAll && matchLen == args.length) {
+    if (matchLen == args.length) {
       // If we are showing all possiblities, also include local
       // completions for the parent command.
       return commands[0]._parent._buildCompletions(args, false)
         .then((localCompletions) {
           completions.addAll(localCompletions);
           return completions;
         });
     }
     return new Future.value(completions);
   }
@@ skipping 75 matching lines @@
     if (_parent is RootCommand) {
       return name;
     } else {
       Command parent = _parent;
       return '${parent.fullName} $name';
     }
   }
 
   toString() => 'Command(${name})';
 }