Reviewed by Amaury Forgeot d'Arc.

an existing .py counterpart, override the co_filename attributes of all
code objects if the original filename is obsolete (which can happen if the
file has been renamed, moved, or if it is accessed through different paths).
Patch by Ziga Seilnacht and Jean-Paul Calderone.

into the extern "C" section.

Add a few more comments and apply some minor edits to make the file contents
fit the original structure again.

Issue #4272: Add an optional argument to the GzipFile constructor to override the timestamp in the gzip stream.

comments at top of decimal.py.  (But note that the from_float
method itself with still not be usable before Python 2.7.)
See issue 4796 for discussion.

Python/hypot.c replacement file.  Use AC_CHECK_FUNCS instead.  This change
should be backported to 2.6 and 3.0.

that it's equal to 1.  (If isinf isn't defined, HAVE_DECL_ISINF is
defined to be 0, rather than being undefined.)

to use AC_CHECK_DECLS instead of AC_CHECK_FUNCS for these.
(See discussion in issue #4506)

issue #2937.  This information can be helpful for diagnosing platform-
specific problems in math and cmath.  The result of the test also
serves as a fairly reliable indicator of whether the x87 floating-point
instructions (as opposed to SSE2) are in use on Intel x86/x86_64 systems.

assuming the compiler will be "cc".

Patch by Gabriel Genellina.

"createtimerhandler", "mainloop", "dooneevent" and "quit" have been
deprecated for removal in 3.x (part of issue #3638).