return a returncode of 0 when the child has already exited or cannot
be waited on.

  default arguments.  Patch contributed by Chris Jerdonek.

HTTP servers and reduce memory usage. It's actually a backport of a Python
3.2 fix. Thanks to Adrien Kunysz.

2.7 : Issue #16013: Fix CSV Reader parsing issue with ending quote characters. Patch by Serhiy Storchaka.

Issue #14167: restore statement about breaks in finally clauses; remove statement about exception chaining.

method doesn't require an argument again.

 #15421: fix an OverflowError in Calendar.itermonthdates() after datetime.MAXYEAR.  Patch by Cédric Krier.

  tools (dpkg-dev) installed.