Add merged patches to commit title in merge-to-branch.

tools/push-to-trunk/test_scripts.py

 #!/usr/bin/env python
 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 967 matching lines @@
     TEST_CONFIG[DOT_GIT_LOCATION] = self.MakeEmptyTempFile()
     TEST_CONFIG[VERSION_FILE] = self.MakeEmptyTempFile()
     self.WriteFakeVersionFile(build=5)
     os.environ["EDITOR"] = "vi"
     extra_patch = self.MakeEmptyTempFile()
 
     def VerifyPatch(patch):
       return lambda: self.assertEquals(patch,
           FileToText(TEST_CONFIG[TEMPORARY_PATCH_FILE]))
 
-    msg = """Version 3.22.5.1
-
-Merged r12345, r23456, r34567, r45678, r56789 into trunk branch.
+    msg = """Version 3.22.5.1 (merged r12345, r23456, r34567, r45678, r56789)
 
 Title4
 
 Title2
 
 Title3
 
 Title1
 
 Title5
@@ skipping 117 matching lines @@
 
 Review URL: https://codereview.chromium.org/83173002
 
 ------------------------------------------------------------------------""")
     self.assertEquals(
 """Prepare push to trunk.  Now working on version 3.23.11.
 
 R=danno@chromium.org
 
 Committed: https://code.google.com/p/v8/source/detail?r=17997""", body)