Fix bug entry and quotation marks in merge-to-branch.

tools/push-to-trunk/merge_to_branch.py

 #!/usr/bin/env python
 # Copyright 2014 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 129 matching lines @@
     for commit_hash in self["patch_commit_hashes"]:
       patch_merge_desc = self.GitLog(n=1, format="%s", git_hash=commit_hash)
       self["new_commit_msg"] += "%s\n\n" % patch_merge_desc
 
     bugs = []
     for commit_hash in self["patch_commit_hashes"]:
       msg = self.GitLog(n=1, git_hash=commit_hash)
       for bug in re.findall(r"^[ \t]*BUG[ \t]*=[ \t]*(.*?)[ \t]*$", msg,
                             re.M):
         bugs.extend(map(lambda s: s.strip(), bug.split(",")))
-    bug_aggregate = ",".join(sorted(bugs))
+    bug_aggregate = ",".join(sorted(filter(lambda s: s and s != "none", bugs)))
     if bug_aggregate:
       self["new_commit_msg"] += "BUG=%s\nLOG=N\n" % bug_aggregate
 
 
 class ApplyPatches(Step):
   MESSAGE = "Apply patches for selected revisions."
 
   def RunStep(self):
     for commit_hash in self["patch_commit_hashes"]:
       print("Applying patch for %s to %s..."
@@ skipping 164 matching lines @@
       UploadStep,
       CommitRepository,
       PrepareSVN,
       TagRevision,
       CleanUp,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
   sys.exit(MergeToBranch(CONFIG).Run())