Quote all arguments when printing test.py command

tools/bots/compiler.py

 #!/usr/bin/python
 
 # 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.
 
 """
 Dart2js buildbot steps
 
 Runs tests for the  dart2js compiler.
@@ skipping 131 matching lines @@
     global IsFirstTestStepCall
     if IsFirstTestStepCall:
       IsFirstTestStepCall = False
     else:
       cmd.append('--append_logs')
 
     if flags:
       cmd.extend(flags)
     cmd.extend(targets)
 
-    print 'running %s' % (' '.join(cmd))
+    print 'Running: %s' % (' '.join(map(lambda arg: '"%s"' % arg, cmd)))
     bot.RunProcess(cmd)
 
 
 def TestCompiler(runtime, mode, system, flags, is_buildbot, test_set):
   """ test the compiler.
    Args:
      - runtime: either 'd8', 'jsshell', or one of the browsers, see GetBuildInfo
      - mode: either 'debug' or 'release'
      - system: either 'linux', 'mac', 'win7', or 'win8'
      - flags: extra flags to pass to test.dart
@@ skipping 158 matching lines @@
   """
   with bot.BuildStep('Build SDK and d8'):
     args = [sys.executable, './tools/build.py', '--mode=' + build_info.mode,
             'dart2js_bot']
     print 'Build SDK and d8: %s' % (' '.join(args))
     bot.RunProcess(args)
 
 
 if __name__ == '__main__':
   bot.RunBot(GetBuildInfo, RunCompilerTests, build_step=BuildCompiler)