Grammar up.

BUG=
TBR=iannucci

Review URL: https://codereview.chromium.org/549613002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@291835 0039d316-1c4b-4281-b951-d872f2087c98

git_cl.py

@@ -2090,7 +2090,7 @@ def SendUpstream(parser, args, cmd):
     _, branch = cl.FetchUpstreamTuple(cl.GetBranch())
     print 'The commit is in the pending queue (%s).' % pending_ref
     print (
-        'It will show up on %s in ~1 min, once it gets Cr-Commit-Position '
+        'It will show up on %s in ~1 min, once it gets a Cr-Commit-Position '
         'footer.' % branch)
 
   hook = POSTUPSTREAM_HOOK_PATTERN % cmd