- insert commas between entries in del statement
  - left and right shifts were represented as >> and << (respectively); reverse
  - unindent properly after for: else:  or while: else:
  - add parens around the result of an unary operation
  - add parens around negative numbers, to avoid turning (-1)**2 into -1**2.

Documentation correction. urllib2.urlopen.info returns a mimetools.Message instance not HTTPMessage object.

when there is a bare IP address in the "Bypass proxy settings
for these Hosts & Domains" list on MacOSX.

on OSX 10.6, therefore don't use it there either.

This fixes issue8621.

1) The code that checks if an path should be located in the SDK
   explicitly excludes /usr/local. This fixes issue9046

2) The SDK variant for filtering "db_dirs_to_check" in setup.py
   was not doing anything because of a missing assignment.

In 2.5 the email version was bumped to 4.0.2 just before release but
after the maintenance branch was set up.  The bump was not backported
to trunk, and 2.6 went out the door with a version number of 4.0.1.
I bumped this to 4.0.2 because of a behavior change, but that makes
it look the same as 2.5.  So bump it again to 4.0.3.

it is typically used in module initialization function. Thanks Tim
Golden for the patch.