Fixed memory leak in error branch of object_repr which may leak a reference to mod when type_name returns NULL. CID 715371

Also adds tests to verify the documented behavior (which is probably a bug, as
indicated in the added comments).

Patch by Chris Jerdonek.

        changeset:   77827:c23b442b5d5e
        user:        Antoine Pitrou <solipsis@pitrou.net>
        date:        Thu Jun 28 01:20:26 2012 +0200
        summary:     Avoid using scrdir, it's broken.

        changeset:   77826:f0e58e778215
        user:        Neil Schemenauer <nas@arctrix.com>
        date:        Wed Jun 27 15:58:37 2012 -0600
        summary:     Fix bug in test_tools that prevented building is separate directory.

they are created in the install locations and with the proper timestamp.
(Solution suggested by MvL)

Patch by Chris Jerdonek.

BSD's make doesn't support some of the features.

This fixes a regression introduced by the fix for issue #13922.  Although args
is not documented as being allowed to be a tuple, previously this worked and
so naturally there are programs in the field that depend on it.

Patch by Zbyszek Jędrzejewski-Szmek.

This was a regression caused by the hash randomization patch.

BSD's make doesn't support some of the features.

sporadic crashes in multi-thread programs when several long deallocator
chains ran concurrently and involved subclasses of built-in container
types.

Because of this change, a couple extension modules compiled for 2.7.4
(those which use the trashcan mechanism, despite it being undocumented)
will not be loadable by 2.7.3 and earlier. However, extension modules
compiled for 2.7.3 and earlier will be loadable by 2.7.4.

and io.StringIO objects now raise ValueError when the object has been closed.
Patch by Alessandro Moura.

Before, the type function was called twice in the case where the default
was specified and the argument was given as well.  This was especially
problematic for the FileType type, as a default file would always be
opened, even if a file argument was specified on the command line.

Patch by Arnaud Fontaine, with additional test by Mike Meyer.

Patch by Mike Hoy.

This is done by extending a previous fix for issue #9185 that was made for
Solaris and OpenBSD to NetBSD as well.