Remove redundant output in git_cl.py tests.

tests/git_cl_test.py

Index: tests/git_cl_test.py
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 961801ed8ff7208b40981666d6b7cf41947ac951..428f48796e634311fa91333d8f4467f89bdf291d 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -1957,7 +1957,10 @@ class TestGitCl(TestCase):
       'current_revision': 'deadbeaf',
     }
     cl._codereview_impl.SubmitIssue = lambda wait_for_merge: None
+    out = StringIO.StringIO()
+    self.mock(sys, 'stdout', out)
     self.assertEqual(0, cl.CMDLand(force=True, bypass_hooks=True, verbose=True))
+    self.assertRegexpMatches(out.getvalue(), 'Issue.*123 has been submitted')
 
 
 if __name__ == '__main__':