Normalize the 15 existing guards to the documented two-level form
get(g:, 'X_recommended_style', get(g:, 'filetype_recommended_style', 1)):
fix the two non-standard "!exists() || != 0" guards (python, arduino) and
tolk's wrong fallback variable, and convert the simple one-level guards.

Add the guard to filetype plugins that set stylistic indentation/format
options without one: aap, abap, ada, cabal, cobol, elixir, falcon,
graphql, heex, idris2, mermaid, occam, racket, scala, swift, tera.

Settings that are required rather than stylistic are left untouched, e.g.
make/gomod/scdoc (mandatory tabs), chatito and vroom (indent mandated by
the format), and the textwidth/formatoptions cases in gitcommit/help/
jjdescription.

Supported by AI.

fixes:  vim/vim#20036
closes: vim/vim#20650

https://github.com/vim/vim/commit/1f33732613304958c935f302d8cb44bddc7f672f

Co-authored-by: Christian Brabandt <cb@256bit.org>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

This reverts commits:
- 6b652a785033fd4164e049492a7327c1ed7c3e5f
- 2f689d5abde0ccddca9e20d8c93a0299bd054e32
- a025a46d4169587145fb54f04af349cd05cb6122

Several email addresses that are known to be valid caused bounces
due to an issue with my email setup. The previous commits incorrectly
marked these addresses as invalid. So revert the whole thing again.

https://github.com/vim/vim/commit/62d8f3dab5a0b30c31a8df86a973c5e59821a3f0

N/A patch:
vim-patch:2f689d5: runtime: mark more invalid email addresses

Co-authored-by: Christian Brabandt <cb@256bit.org>

https://github.com/vim/vim/commit/2f689d5abde0ccddca9e20d8c93a0299bd054e32

Skip colors/ and syntax/help_ru.vim: missing previous changes.

Co-authored-by: Christian Brabandt <cb@256bit.org>

Problem:  runtime(compiler): pytest compiler not included
Solution: include pytest compiler, update the compiler completion test
          (Konfekt)

closes: vim/vim#16130

https://github.com/vim/vim/commit/3c2596a9e967910143d41fbb9615614ab36d43a7

Co-authored-by: Konfekt <Konfekt@users.noreply.github.com>

runtime(python): Fix wrong define regex in ftplugin (vim/vim#14763)

https://github.com/vim/vim/commit/7961210b861ce9a1a773cfc1fe96b388216bb1f2

Co-authored-by: Tom Picton <tom@tompicton.com>

ftplugin(python): E16 fix, async keyword support for define (vim/vim#14751)

This change includes the following changes:
- Fix "E16: Invalid range" when using a count with jump to start/end of class/method
- Update define with optional async keyword
- Update maintainer email

https://github.com/vim/vim/commit/86f6e2c2eed7df2bf5c60cc74d08d7a8d3c75f45

Co-authored-by: Tom Picton <tom@tompicton.com>

runtime(ftplugin): Use "*" browsefilter pattern to match "All Files"

Problem:  The "*.*" browsefilter pattern only matches all files on
	  Windows (Daryl Lee)
Solution: Use "*" to filter on all platforms but keep "*.*" as the label
	  text on Windows. (Fixes vim/vim#12685, Doug Kearns)

The *.* browsefilter pattern used to match "All Files" on Windows is a
legacy of the DOS 8.3 filename wildcard matching algorithm.  For reasons
of backward compatibility this still works on Windows to match all
files, even those without an extension.

However, this pattern only matches filenames containing a dot on other
platforms.  This often makes files without an extension difficult to
access from the file dialog, e.g., "Makefile"

On Windows it is still standard practice to use "*.*" for the filter
label so ftplugins should use "All Files (*.*)" on Windows and "All
Files (*)" on other platforms.  This matches Vim's default browsefilter
values.

This commit also normalises the browsefilter conditional test to check
for the Win32 and GTK GUI features and an unset b:browsefilter.

closes: vim/vim#12759

https://github.com/vim/vim/commit/93197fde0f1db09b1e495cf3eb14a8f42c318b80

Co-authored-by: Doug Kearns <dougkearns@gmail.com>

Update runtime files.
https://github.com/vim/vim/commit/4f4d51a942cc2c6b3e936ee0f93f00c2d000065c

Omit "??" operator.
Patches v8.2.1794,v8.2.1798 are not ported yet.

Update runtime files.
https://github.com/vim/vim/commit/63b74a8362b14576b21d342dc424d0396ca8ea27

Update runtime files.
https://github.com/vim/vim/commit/7dda86f2ff35bb80afce4da24782fd58216bbe50