Rename retcode to returncode to be consistent with subprocess.

tests/fake_repos.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.
 
 """Generate fake repositories for testing."""
 
 import atexit
 import errno
 import logging
@@ skipping 578 matching lines @@
       # Strip the begining
       while expected and result and expected[0] == result[0]:
         expected = expected[1:]
         result = result[1:]
       # The exception trace makes it hard to read so dump it too.
       if '\n' in result:
         print result
     self.assertEquals(expected, result, msg)
 
   def check(self, expected, results):
-    """Checks stdout, stderr, retcode."""
+    """Checks stdout, stderr, returncode."""
     self.checkString(expected[0], results[0])
     self.checkString(expected[1], results[1])
     self.assertEquals(expected[2], results[2])
 
   def assertTree(self, tree, tree_root=None):
     """Diff the checkout tree with a dict."""
     if not tree_root:
       tree_root = self.root_dir
     actual = read_tree(tree_root)
     diff = dict_diff(tree, actual)
@@ skipping 52 matching lines @@
 
 
 # Kind of hack.
 if '-l' in sys.argv:
   FakeRepos.SHOULD_LEAK = True
   sys.argv.remove('-l')
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))