Support pub --with-prejudice.

sdk/lib/_internal/pub/lib/src/progress.dart

 // Copyright (c) 2012, 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.
 
 library pub.progress;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'log.dart' as log;
@@ skipping 63 matching lines @@
 
   /// Stop animating the progress indicator.
   ///
   /// This will continue running the stopwatch so that the full time can be
   /// logged in [stop].
   void stopAnimating() {
     if (_timer == null) return;
 
     // Print a final message without a time indicator so that we don't leave a
     // misleading half-complete time indicator on the console.
-    stdout.writeln("\r$_message...");
+    stdout.writeln(log.format("\r$_message..."));
     _timer.cancel();
     _timer = null;
   }
 
   /// Refreshes the progress line.
   void _update() {
-    stdout.write("\r$_message... ");
+    stdout.write(log.format("\r$_message... "));
 
     // Show the time only once it gets noticeably long.
     if (_stopwatch.elapsed.inSeconds > 0) {
       stdout.write(log.gray(_time));
     }
   }
 }