Quote all arguments when printing test.py command

tools/bots/bot.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.
 
 """
 Shared code for use in the buildbot scripts.
 """
 
@@ skipping 198 matching lines @@
       '--progress=buildbot',
       '-v', '--time', '--use-sdk', '--report'
     ]
 
     if build_info.checked:
       cmd.append('--checked')
 
     cmd.extend(flags)
     cmd.extend(targets)
 
-    print 'Running: %s' % (' '.join(cmd))
+    print 'Running: %s' % (' '.join(map(lambda arg: '"%s"' % arg, cmd)))
     RunProcess(cmd)
 
 
 def RunProcess(command):
   """
   Runs command.
 
   If a non-zero exit code is returned, raises an OSError with errno as the exit
   code.
   """
   exit_code = subprocess.call(command, env=NO_COLOR_ENV)
   if exit_code != 0:
     raise OSError(exit_code)
 
 
 def GetStepName(name, flags):
   """
   Filters out flags with '=' as this breaks the /stats feature of the buildbot.
   """
   flags = [x for x in flags if not '=' in x]
   return ('%s tests %s' % (name, ' '.join(flags))).strip()