Use %B format instead of %s\n\n%b to get the raw commit message from a hash.

\n doesn't work on Windows, and %B is shorter anyway.

BUG=586344

Review URL: https://codereview.chromium.org/1705193003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298845 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/tests/git_cl_test.py b/tests/git_cl_test.py
index 53815f6..4015bb3 100755
--- a/tests/git_cl_test.py
+++ b/tests/git_cl_test.py
@@ -602,7 +602,7 @@
     if squash:
       ref_to_push = 'abcdef0123456789'
       calls += [
-          ((['git', 'show', '--format=%s\n\n%b', '-s',
+          ((['git', 'show', '--format=%B', '-s',
             'refs/heads/git_cl_uploads/master'],),
            (description, 0)),
           ((['git', 'config', 'branch.master.merge'],),