Issue #13839: When invoked on the command-line, the pstats module now accepts several filenames of profile stat files and merges them all.
Patch by Matt Joiner.

Windows build is compiled with no-threaded tcl/tk by default

In Python2, if a unicode string was assigned as the value of a header,
email would automatically CTE encode it using the UTF8 charset.
This capability was lost in the Python3 translation, and this patch
restores it.

Patch by Ali Ikinci, assisted by R. David Murray.

I also added a fix for the mailbox test that was depending (with a comment
that it was a bad idea to so depend) on non-ASCII causing message_from_string
to raise an error.  It now uses support.patch to induce an error during
message serialization.

In Python2, if a unicode string was assigned as the value of a header,
email would automatically CTE encode it using the UTF8 charset.
This capability was lost in the Python3 translation, and this patch
restores it.

Patch by Ali Ikinci, assisted by R. David Murray.

I also added a fix for the mailbox test that was depending (with a comment
that it was a bad idea to so depend) on non-ASCII causing message_from_string
to raise an error.  It now uses support.patch to induce an error during
message serialization.

default: closes Issue12365 - Add an example explaining the context manager use case of urllib.urlopen

Issue10050 - urlretrieve uses newer urlopen. reporthook of urlretrieve takes, block number, block read size, file_size

structure. timeval.tv_sec is a long on Windows, not time_t.

gmtime() failure on Windows

and datetime.datetime.utcfromtimestamp() now raise an OSError instead of
ValueError if localtime() or gmtime() failed.

Patch by Roger Serwy.

Patch by Roger Serwy.

Patch by Guilherme Polo and Andrew Svetlov.

Patch by Guilherme Polo and Andrew Svetlov.

Mac OS X to prevent interpreter crashes when compiled on 10.7.

Use volatile keyword to disable localy unsafe float optimizations.

time.ctime(), gmtime(), time.localtime(), datetime.date.fromtimestamp(),
datetime.datetime.fromtimestamp() and datetime.datetime.utcfromtimestamp() now
raises an OverflowError, instead of a ValueError, if the timestamp does not fit
in time_t.

datetime.datetime.fromtimestamp() and datetime.datetime.utcfromtimestamp() now
round microseconds towards zero instead of rounding to nearest with ties going
away from zero.