Fix chromium ranges output in v8 releases script.

tools/push-to-trunk/releases.py

 #!/usr/bin/env python
 # Copyright 2014 the V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script retrieves the history of all V8 branches and trunk revisions and
 # their corresponding Chromium revisions.
 
 import argparse
 import csv
@@ skipping 88 matching lines @@
     ran = "%s:%d" % (cr_from[0], int(cr_to[0]) - 1)
 
     # Collect the ranges in lists per revision.
     range_lists.setdefault(cr_from[1], []).append(ran)
 
   # Add the newest revision.
   if cr_releases:
     range_lists.setdefault(cr_releases[-1][1], []).append(cr_releases[-1][0])
 
   # Stringify and comma-separate the range lists.
-  return dict((rev, ",".join(ran)) for rev, ran in range_lists.iteritems())
+  return dict((rev, ", ".join(ran)) for rev, ran in range_lists.iteritems())
 
 
 def MatchSafe(match):
   if match:
     return match.group(1)
   else:
     return ""
 
 
 class Preparation(Step):
@@ skipping 39 matching lines @@
       # The SVN revision on the branch.
       "revision": self.GitSVNFindSVNRev(git_hash),
       # The SVN revision on bleeding edge (only for newer trunk pushes).
       "bleeding_edge": self.GetBleedingEdgeFromPush(title),
       # The branch name.
       "branch": branch,
       # The version for displaying in the form 3.26.3 or 3.26.3.12.
       "version": version,
       # Merged patches if available in the form 'r1234, r2345'.
       "patches_merged": patches,
+      # Default for easier output formatting.
+      "chromium_revision": "",
     }, self["patch"]
 
   def GetReleasesFromBranch(self, branch):
     self.GitReset("svn/%s" % branch)
     releases = []
     try:
       for git_hash in self.GitLog(format="%H").splitlines():
         if self._config[VERSION_FILE] not in self.GitChangedFiles(git_hash):
           continue
         if self.ExceedsMax(releases):
@@ skipping 196 matching lines @@
       UpdateChromiumCheckout,
       RetrieveChromiumV8Releases,
       SwitchV8,
       CleanUp,
       WriteOutput,
     ]
 
 
 if __name__ == "__main__":  # pragma: no cover
   sys.exit(Releases(CONFIG).Run())