Need to strip the config result value otherwise it contains a \n.

It was broken in 88979. Someone my limited testing missed that.

TBR=dpranke@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/7147016

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@88987 0039d316-1c4b-4281-b951-d872f2087c98

git_cl.py

@@ -533,7 +533,7 @@ or verify this branch is set up to track another (via the --track argument to
                                 '%s...' % (upstream_branch)]).strip()
 
     if not author:
-      author = RunGit(['config', 'user.email'])
+      author = RunGit(['config', 'user.email']).strip()
     change = presubmit_support.GitChange(
         name,
         description,