Remove pkg_add -r python from FreeBSD installation section.
Moved to OpenBSD.

This note incorrectly stated that "Base64 has an expansion factor of 6
to 4" (it is actually 4 to 3). It was decided to remove the note.

Using the system and place-dependent default encoding for open()
is a bad idea for IDLE's system and location-independent files.

GUI test test_file_buttons() only looks at initial ascii-only lines,
but failed on systems where open() defaults to 'ascii' because
readline() internally reads and decodes far enough ahead to encounter
a non-ascii character in CREDITS.txt.

The PrintNameOffset field of the reparse data buffer
was treated as a number of characters instead of bytes.

Describe *text* as an alias for *universal_newlines* in more places that people are likely to be referred to.

This is not the ideal solution; this means that a test module is now
always included in the main python3x.dll.  However, we're already
including xxsubtype, so why not?

The new link is given in a red box on the old page.

We don't use debugger on Travis.

Importing unicodedata in sre_parse leads to failure in compilation.
unicodedata is unused during compilation, and is not compiled when this
file is imported. The error occurs when generating posix variables,
pprint is required. The dependency chain goes on like this:

sysconfig -> pprint -> re -> sre_compile -> sre_parse (this file)

This commits fixes compilation issues introduced by
2272cec13b53c405d86c45d404f035f201c0baef.
(Issue 30688, GH-5588)

Co-authored-by: Jonathan Eunice <jonathan.eunice@gmail.com>

Co-authored-by: Jake Davis <jcdavis@awedge.net>

fnmatch.translate() no longer produces patterns which contain set
operations.

Sets starting with '[' or containing '--', '&&', '~~' or '||' will
be interpreted differently in regular expressions in future versions.
Currently they emit warnings. fnmatch.translate() now avoids producing
patterns containing such sets by accident.

* use isinstance(..)  instead of type(..)
* use  '.. not in ..'  instead of 'not .. in ..	'

Fix bug in travis configuration where it did not run the tests when
a change includes both code and doc changes.

Fixes the documentation for `subprocess.check_output()` not mentioning that the encoding and errors parameters were added in 3.6.

It now reads: ...be aware that Python has no control over...

it was using our mocked listdir to check when the files were gone.

Fix a rare but potential pre-exec child process deadlock in subprocess on POSIX systems when marking file descriptors inheritable on exec in the child process.  This bug appears to have been introduced in 3.4 with the inheritable file descriptors support.

This also changes Python/fileutils.c `set_inheritable` to use the "slow" two `fcntl` syscall path instead of the "fast" single `ioctl` syscall path when asked to be async signal safe (by way of being asked not to raise exceptions).  `ioctl` is not a POSIX async-signal-safe approved function.

ref: http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html

Documents bpo-15873

now longer -> no longer

`arg_name` and `element_index` are defined as `digit`+ instead of `integer`.