by adding a new tag.  Patch by Mark Roseman. Also give <pre> text a very
light blueish-gray background similar to that used by Sphinx html.

Patch by Benjamin Hodgson.

Patch written by Prashant Tyagi.

to finish making current README.txt obsolete.

Some were missing and notes were not correct.

Some of the details of comparing mixed types were incorrect or ambiguous.
NotImplemented is only relevant at a lower level than the Expressions
chapter. Added details of comparing range() objects, and default behaviour
and consistency suggestions for user-defined classes. Patch from Andy Maier.

so it is not triggered on import.  The problem is creation of a now-unused
instance "helpDialog = HelpDialog()", left for back compatibility.
So instead trigger the warning when that instance or another is used.

This restores the ability to write encoding names in uppercase like "UTF-8",
which worked in Python 2.

Patch by Mark Roseman.

Issue #19143: platform module now reads Windows version from kernel32.dll to avoid compatibility shims.

Change destination to help.html.  Adjust NEWS entries.

The proactor event loop requires also to mock loop._stop_serving.

ssl.SSLContext() does not always disable compression. Fix unit test.

sequence of strings. Patch written by Yann Sionneau.

This info is required on Python 3.5 and newer to get specific information on
the SSL object, like getting the binary peer certificate (instead of getting
it as text).

of catching socket.EAI_NODATA error which doesn't exist on FreeBSD.

above "What's New and 0 lines above "Release date".  Remove most old headers
for non-final releases (they currently do not get carried forward.

threading and multiprocessing modules.

In multiprocessing, the name of the first parameter of the acquire methods is
"block", but "blocking" in threading.

This commit also improves documentation of Lock and RLock.

Patch by Davin Potts.

Patch by Bar Harel.

The new idlelib/idle.html is copied from Doc/build/html/idle.html.
It looks better than help.txt and will better document Idle as released.
The tkinter html viewer that works for this file was written by Rose Roseman.
The new code is in idlelib/help.py, a new file for help menu classes.
The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated.

Patch by Bar Harel.

Leopard because this OS uses out of date (pre 2011k) timezone files.

of datetime.datetime: microseconds are now rounded to nearest with ties going
to nearest even integer (ROUND_HALF_EVEN), instead of being rounding towards
zero (ROUND_DOWN). It's important that these methods use the same rounding
mode than datetime.timedelta to keep the property:

   (datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t)

It also the rounding mode used by round(float) for example.

Add more unit tests on the rounding mode in test_datetime.