Largely reduce the number of pylint warnings and fix one typo.

gclient.py

 #!/usr/bin/python
 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Meta checkout manager supporting both Subversion and GIT.
 
 Files
   .gclient      : Current client configuration, written by 'config' command.
                   Format is a Python script defining 'solutions', a list whose
@@ skipping 40 matching lines @@
 
 __version__ = "0.6.1"
 
 import copy
 import logging
 import optparse
 import os
 import posixpath
 import pprint
 import re
-import subprocess
 import sys
 import urlparse
 import urllib
 
-import breakpad
+import breakpad  # pylint: disable=W0611
 
 import gclient_scm
 import gclient_utils
 from third_party.repo.progress import Progress
 
 
-def attr(attr, data):
+def attr(attribute, data):
   """Sets an attribute on a function."""
   def hook(fn):
-    setattr(fn, attr, data)
+    setattr(fn, attribute, data)
     return fn
   return hook
 
 
 ## GClient implementation.
 
 
 class GClientKeywords(object):
   class FromImpl(object):
     """Used to implement the From() syntax."""
@@ skipping 1161 matching lines @@
     return CMDhelp(parser, argv)
   except gclient_utils.Error, e:
     print >> sys.stderr, 'Error: %s' % str(e)
     return 1
 
 
 if '__main__' == __name__:
   sys.exit(Main(sys.argv[1:]))
 
 # vim: ts=2:sw=2:tw=80:et: