Add newline to git-new-branch output.

R=iannucci@chromium.org, pgervais@chromium.org

Review URL: https://codereview.chromium.org/261843002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@267616 0039d316-1c4b-4281-b951-d872f2087c98

git_new_branch.py

@@ -46,7 +46,7 @@ def main(args):
     sys.stdout.write(cpe.stdout)
     sys.stderr.write(cpe.stderr)
     return 1
-  sys.stderr.write('Switched to branch %s.' % opts.branch_name)
+  sys.stderr.write('Switched to branch %s.\n' % opts.branch_name)
 
 
 if __name__ == '__main__':  # pragma: no cover