Fix change log generation in push-to-trunk script.

tools/push-to-trunk/common_includes.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 87 matching lines @@
 
 def MakeChangeLogBody(commit_messages, auto_format=False):
   result = ""
   added_titles = set()
   for (title, body, author) in commit_messages:
     # TODO(machenbach): Better check for reverts. A revert should remove the
     # original CL from the actual log entry.
     title = title.strip()
     if auto_format:
       # Only add commits that set the LOG flag correctly.
-      log_exp = r"^[ \t]*LOG[ \t]*=[ \t]*(?:Y(?:ES)?)|TRUE"
+      log_exp = r"^[ \t]*LOG[ \t]*=[ \t]*(?:(?:Y(?:ES)?)|TRUE)"
       if not re.search(log_exp, body, flags=re.I | re.M):
         continue
       # Never include reverts.
       if title.startswith("Revert "):
         continue
       # Don't include duplicates.
       if title in added_titles:
         continue
 
     # Add and format the commit's title and bug reference. Move dot to the end.
@@ skipping 358 matching lines @@
               options,
               side_effect_handler=DEFAULT_SIDE_EFFECT_HANDLER):
   state = {}
   steps = []
   for (number, step_class) in enumerate(step_classes):
     steps.append(MakeStep(step_class, number, state, config,
                           options, side_effect_handler))
 
   for step in steps[options.s:]:
     step.Run()