It now has slightly better rationale and a less awkward wording in the
explanation.

Inspired by a report of a neither/or conflict by 'animalize' on docs@.

This changes the main documentation, doc strings, source code comments, and a
couple error messages in the test suite. In some cases the word was removed
or edited some other way to fix the grammar.

This restores details lost in revision 097f4fda61a4 (since Python 3.3,
related to the new OSError subclasses). Further additions:

* Markup for attributes and constructor signature
* Explain "winerror" and "filename2"
* Extend test to check for filename2 defaulting to None
* Clarify that the constructor can return a subclass

I have intentionally left out any details of allowing more than five
arguments, or how the "args" attribute is set for four or more arguments.
These details seem to be dependent on the Python version and platform.

Patch written by Bernt Røskar Brenna.

tab in the IDLE Preferences dialog.  Code patch by Mark Roseman.

Also add to comment in the C code.

Patch by Henrik Heimbuerger and Bar Harel.

Also change glossary heading from view

curious users.  The previous user content is now in the IDLE doc and is
redundant.  IDLE now means 'Integrated Development and Learning Environment'.

Patch by Benjamin Hodgson.

Patch written by Prashant Tyagi.

to finish making current README.txt obsolete.

Some were missing and notes were not correct.

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).

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.

Reported by Jakub Wilk.

Fixed the case of the "Ctrl-" prefixes.