Drew Vogel [Sat, 10 May 2025 12:46:28 +0000 (14:46 +0200)]
patch 9.1.1377: patch v9.1.1370 causes some GTK warning messages
Problem: Some GTK3 users experienced unexpectedly small windows at
startup (after v9.1.1368, @berggeist, Tony Mechelynck)
Solution: Update window manager hints in gui_mch_open, partly revert
v9.1.1370 (Drew Vogel)
fixes: #17279
closes: #17288
Signed-off-by: Drew Vogel <dvogel@github> Signed-off-by: Christian Brabandt <cb@256bit.org>
Andis Spriņķis [Sat, 10 May 2025 12:42:25 +0000 (14:42 +0200)]
runtime(lf): use syn iskeyword in syntax script
Sets 'syn iskeyword' in syntax/lf.vim to fix the missing lf keyword
highlighting in lines like 'map e :open; open' (first 'open' not
highlighted).
applies PR andis-sprinkis/lf-vim#21 by @joelim-work
closes: andis-sprinkis/lf-vim#14
Co-authored-by: Joe Lim <50560759+joelim-work@users.noreply.github.com> Signed-off-by: Andis Spriņķis <andis@sprinkis.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Sean Dewar [Sat, 10 May 2025 12:33:28 +0000 (14:33 +0200)]
patch 9.1.1376: quickfix dummy buffer may remain as dummy buffer
Problem: when failing to wipeout a quickfix dummy buffer, it will
remain as a dummy buffer, despite being kept.
Solution: clear its dummy BF_DUMMY flag in this case (Sean Dewar).
closes: #17283
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Sean Dewar [Sat, 10 May 2025 12:30:36 +0000 (14:30 +0200)]
patch 9.1.1375: [security]: possible heap UAF with quickfix dummy buffer
Problem: heap use-after-free possible when autocommands switch away from the
quickfix dummy buffer, but leave it open in a window.
Solution: close its windows first before attempting the wipe.
(Sean Dewar)
related: #17283
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Girish Palya [Thu, 8 May 2025 21:28:52 +0000 (23:28 +0200)]
patch 9.1.1374: completion: 'smartcase' not respected when filtering matches
Problem: Currently, 'smartcase' is respected when completing keywords
using <C-N>, <C-P>, <C-X><C-N>, and <C-X><C-P>. However, when
a user continues typing and the completion menu is filtered
using cached matches, 'smartcase' is not applied. This leads
to poor-quality or irrelevant completion suggestions, as shown
in the example below.
Solution: When filtering cached completion items after typing additional
characters, apply case-sensitive comparison if 'smartcase' is
enabled and the typed pattern includes uppercase characters.
This ensures consistent and expected completion behavior.
(Girish Palya)
closes: #17271
Signed-off-by: Girish Palya <girishji@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
glepnir [Thu, 8 May 2025 21:05:10 +0000 (23:05 +0200)]
patch 9.1.1373: 'completeopt' checking logic can be simplified
Problem: Flag checking logic uses a temporary variable and multiple
bitwise operations in insexpand.c
Solution: Consolidate into a single equality check using bitwise OR and
comparison (glepnir)
closes: #17276
Signed-off-by: glepnir <glephunter@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Drew Vogel [Wed, 7 May 2025 20:05:17 +0000 (22:05 +0200)]
patch 9.1.1370: CI Tests favor GTK2 over GTK3
Problem: CI Tests favor GTK2 over GTK3
Solution: Install GTK3 dependencies and debug packages for CI workflows,
update ASAN suppression list, update required dependency
checks for the tests (Drew Vogel)
closes: #17253
Signed-off-by: Drew Vogel <dvogel@github> Signed-off-by: Christian Brabandt <cb@256bit.org>
John Marriott [Wed, 7 May 2025 17:59:42 +0000 (19:59 +0200)]
patch 9.1.1367: too many strlen() calls in gui.c
Problem: too many strlen() calls in gui.c
Solution: refactor gui.c slightly (John Marriott)
This does the following changes:
- use macro STRCMP() instead of strcmp().
- refactor gui_outstr_nowrap() to remove call to STRLEN().
- refactor get_tabline_label() in attempt to simply it. At the same time
use standard looping construct for iterating over windows in a tab.
Move variables closer to where they are used. Add check that we don't
exceed size of NameBuff.
- small optimisation in get_find_dialog_text() to measure the string
length once.
closes: #17269
Signed-off-by: John Marriott <basilisk@internode.on.net> Signed-off-by: Christian Brabandt <cb@256bit.org>
Phạm Bình An [Tue, 6 May 2025 16:08:38 +0000 (18:08 +0200)]
runtime(lua): update 'path' option in filetype plugin
Problem: Lua doesn't support importing module in path related to current
file like JS does (https://www.reddit.com/r/lua/comments/wi0bau/whats_the_correct_way_to_run_a_lua_file_that_uses/)
Solution: Remove `.` from Lua buffer-local option `'path'`
closes: #17267
Signed-off-by: Phạm Bình An <phambinhanctb2004@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Peter Kenny [Mon, 5 May 2025 18:15:39 +0000 (20:15 +0200)]
runtime(helptoc): the helptoc package can be improved
Adds the following changes:
- New Maintainer: Pete Kenny
- New filetypes supported (asciidoc, html, tex, vim, xhtml)
- improved Markdown support
- Sanitised ToCs and popup presentation
- Configuration improvements and options
- Add helptoc.txt help file
closes: #17255
Signed-off-by: Peter Kenny <github.com@k1w1.cyou> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1362: Vim9: type ignored when adding tuple to instance list var
Problem: Vim9: type ignored when adding tuple to instance list var
(Lifepillar)
Solution: When getting the typval of class and object member variables,
set the variable type (Yegappan Lakshmanan)
fixes: #17236
closes: #17244
Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Sean Dewar [Sat, 3 May 2025 16:37:27 +0000 (18:37 +0200)]
patch 9.1.1361: [security]: possible use-after-free when closing a buffer
Problem: [security]: Possible to open more windows into a closing
buffer without splitting, bypassing existing "b_locked_split"
checks and triggering use-after-free
Solution: Disallow switching to a closing buffer. Editing a closing
buffer (via ":edit", etc.) was fixed in v9.1.0764, but add an
error message and check just "b_locked_split", as "b_locked"
is necessary only when the buffer shouldn't be wiped, and may
be set for buffers that are in-use but not actually closing.
(Sean Dewar)
closes: #17246
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
zeertzjq [Fri, 2 May 2025 13:35:58 +0000 (15:35 +0200)]
patch 9.1.1360: filetype: GNU Radio companion files are not recognized
Problem: filetype: GNU Radio companion files are not recognized
Solution: detect *.grc files as xml or yaml filetype depending on the
first line (zeertzjq).
zeertzjq [Fri, 2 May 2025 13:32:23 +0000 (15:32 +0200)]
patch 9.1.1359: filetype: GNU Radio config files are not recognized
Problem: filetype: GNU Radio config files are not recognized.
Solution: detect GNU Radio config files as confini filetype. Only
allow '#' as start of comment in confini syntax (zeertzjq).
Phạm Bình An [Thu, 1 May 2025 15:40:15 +0000 (17:40 +0200)]
runtime(doc): update example ctags program and links
- :helptags is also a tags generating program, it deserves mentioning
- JTags seems too dead: its website has been sold, the source, binary
can't be found anywhere.
- update link of ptags
closes: #17233
Signed-off-by: Phạm Bình An <111893501+brianhuster@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Phạm Bình An [Thu, 1 May 2025 15:30:58 +0000 (17:30 +0200)]
patch 9.1.1357: Vim incorrectly escapes tags with "[" in a help buffer
Problem: Vim incorrectly escapes tags containing "[" in a help buffer
Solution: check if the buffer has the "help" filetype set, instead of
already being a help buffer (Phạm Bình An)
fixes: #17224
closes: #17232
Co-authored-by: Christian Brabandt <cb@256bit.org> Co-authored-by: zeertzjq <zeertzjq@outlook.com> Signed-off-by: Phạm Bình An <phambinhanctb2004@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1355: The pum_redraw() function is too complex
Problem: The pum_redraw function is too complex and difficult to
maintain with nested loops and mixed responsibilities handling
both RTL and LTR text rendering.
Solution: Extracted core rendering logic into dedicated helper functions
(pum_display_rtl_text, pum_display_ltr_text, pum_draw_scrollbar,
pum_process_item) while preserving the original behavior. This
improves code readability and maintainability (glepnir).
closes: #17204
Signed-off-by: glepnir <glephunter@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1354: tests: Test_terminalwinscroll_topline() fails on Windows
Problem: tests: Test_terminalwinscroll_topline() fails on Windows
(after v9.1.1348)
Solution: instead of disabling it in Github Actions runners, disable it
for all Windows runs
patch 9.1.1351: Return value of getcmdline() inconsistent in CmdlineLeavePre
Problem: Return value of getcmdline() inconsistent in CmdlineLeavePre
when leaving cmdline in different ways (after v9.1.1329).
Solution: Trigger CmdlineLeavePre before calling abandon_cmdline() so
that getcmdline() can return the command line (zeertzjq).
runtime(java): Consent to HTML tags folding in Javadoc comments
HTML tags in Javadoc comments can additionally be folded
after applying
------------------------------------------------------------
let g:html_syntax_folding = 1
set foldmethod=syntax
------------------------------------------------------------
and giving explicit consent with
------------------------------------------------------------
let g:java_consent_to_html_syntax_folding = 1
------------------------------------------------------------
Do not default to this kind of folding unless ALL start tags
and optional end tags are balanced in Javadoc comments;
otherwise, put up with creating runaway folds that break
syntax highlighting.
resolves: zzzyxwvut/java-vim#8.
closes: #17216
Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: CmdlineLeavePre may trigger twice
(after v9.1.1329)
Solution: check that the key was typed, trigger it when it wasn't before
(Girish Palya)
There are two problems:
- CmdlineLeavePre may be triggered twice when a cabbr is present.
- CmdlineLeavePre fails to trigger when exiting the command-line via
<Backspace>.
Check if the Carriage Return (Enter) key was actually typed.
Trigger the event when the command-line is exited using Backspace and
other keys.
closes: #17214
Signed-off-by: Girish Palya <girishji@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit contains the following changes:
- Fixes Warning 1:
The prototype of `GetMenuState()` says that it returns a UINT, but
returns -1 on failure. Huh?!?
Also, Microsoft says that this function has been superseded (see
https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getmenustate)
and replaced by `GetMenuItemInfo()`. Both of these functions have a
minimum support of Windows 2000.
Therefore in `_OnMenuSelect()`, replace the call to `GetMenuState()`
with `GetMenuItemInfo()`.
- Fixes Warning 2:
Add `UNUSED` to the definition of `_OnGetDpiScaledSize()`.
- Simplify `logfont2name()`.
- Add small optimisations in `_OnNotify()` and `gui_mch_do_spawn()`.
- Add out-of-memory check in `gui_mch_do_spawn()`.
- Code cosmetics (see definitions of `process_message_usual_key_classic()`
and `process_message()`).
closes: #17208
Signed-off-by: John Marriott <basilisk@internode.on.net> Signed-off-by: Christian Brabandt <cb@256bit.org>
runtime(doc): clarify complete_match() and 'isexpand' option
clarify complete_match() documentation to better explain its backward
search behavior, argument handling, and return value format and add an
example of isexpand
closes: #17212
Signed-off-by: glepnir <glephunter@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
John Marriott [Fri, 25 Apr 2025 17:14:38 +0000 (19:14 +0200)]
patch 9.1.1346: missing out-of-memory check in textformat.c
Problem: missing out-of-memory check in textformat.c
Solution: add out-of-memory check, add small optimizations to
internal_format() and same_leader() (John Marriott)
closes: #17200
Signed-off-by: John Marriott <basilisk@internode.on.net> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1345: tests: Test_xxd_color2() test failure dump diff is misleading
Problem: tests: Test_xxd_color2() test failure dump diff is misleading
Solution: Ensure the reference dump and the test dump are both processed the
same (Drew Vogel).
Background:
Commit b6dc76b6fd23e571d309064b795847ee9ffc7689 sought to make the xxd
screendump tests compatible with non-standard `XXD` overrides. It provides a
vim script that matches a very general `xxd` command pattern but then also
removed the matching line from the reference dump. This second step was
unnecessary because `VerifyScreenDump()` runs the associated vim script against
both the reference dump and the test dump.
Problem Details:
As part of some unrelated work, the GUI tests were failing with a window size 1
column too narrow. The screendumps in `Test_xxd_color2` were failing as a
result. When I loaded the diff using `term_dumpdiff()` the associated vim
scripts are not run. As a result, the test dump contained the `xxd` invocation
on line 1 while reference dump did not. This throws the diff off, obscuring the
true issue of the GUI window being too narrow.
Verification:
In addition to the test suite, locally I've tried to recreate the issue being
fixed in b6dc76b6fd23e571d309064b795847ee9ffc7689. Setting a very non-standard
`XXD` path, this test still passes:
```
XXD=/home/dvogel/opt/vim/bin/xxd TEST_FILTER=Test_xxd_color2 TERM=xterm-color make test_xxd
rm -f test_xxd.res test.log messages starttime
if test -n "${ASAN_OPTIONS}"; then \
XXD=../xxd/xxd; export XXD; ASAN_OPTIONS="${ASAN_OPTIONS}_test_xxd" \
UBSAN_OPTIONS="${UBSAN_OPTIONS}_test_xxd" VIMRUNTIME=../../runtime ../vim -f \
-u unix.vim --gui-dialog-file guidialog -U NONE --noplugin --not-a-term -S \
runtest.vim test_xxd.vim ; \
fi
From test_xxd.vim:
Executed Test_xxd_color2() in 0.066049 seconds
Filtered 17 tests with $TEST_FILTER and $TEST_SKIP_PAT
Executed 1 test in 0.096862 seconds
```
closes: #17202
Signed-off-by: Drew Vogel <dvogel@github> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1344: double free in f_complete_match() (after v9.1.1341)
Problem: double free in f_complete_match() (after v9.1.1341)
Solution: remove additional free of trig pointer, correctly free
regmatch.regprog and before_cursor in the error case
closes: #17203
Signed-off-by: glepnir <glephunter@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1342: Shebang filetype detection can be improved
Problem: Shebang filetype detection can be improved
Solution: Improve detection logic (Eisuke Kawashima)
Vim does not correctly detect filetype from
- `#!/usr/bin/env --split-string=awk -f`
- `#!/usr/bin/env -S -i awk -f`
- `#!/usr/bin/env -S VAR= awk -f`
So update the current detection logic to detect those cases.
closes: #17199
Signed-off-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Cannot define completion triggers and act upon it
Solution: add the new option 'isexpand' and add the complete_match()
function to return the completion matches according to the
'isexpand' setting (glepnir)
Currently, completion trigger position is determined solely by the
'iskeyword' pattern (\k\+$), which causes issues when users need
different completion behaviors - such as triggering after '/' for
comments or '.' for methods. Modifying 'iskeyword' to include these
characters has undesirable side effects on other Vim functionality that
relies on keyword definitions.
Introduce a new buffer-local option 'isexpand' that allows specifying
different completion triggers and add the complete_match() function that
finds the appropriate start column for completion based on these
triggers, scanning backwards from cursor position.
This separation of concerns allows customized completion behavior
without affecting iskeyword-dependent features. The option's
buffer-local nature enables per-filetype completion triggers.
closes: #16716
Signed-off-by: glepnir <glephunter@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: cannot complete :filetype arguments (Phạm Bình An)
Solution: add :filetype ex command completion, add "filetypecmd"
completion type for getcompletion()
fixes: #17165
closes: #17167
Co-authored-by: zeertzjq <zeertzjq@outlook.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
John Marriott [Wed, 23 Apr 2025 18:56:08 +0000 (20:56 +0200)]
patch 9.1.1339: missing out-of-memory checks for enc_to_utf16()/utf16_to_enc()
Problem: missing out-of-memory checks for enc_to_utf16() and
utf16_to_enc()
Solution: Add out-of-memory checks and fix a few other minor issues
(John Marriott)
This change does:
- add missing out-of-memory checks for enc_to_utf16() and
utf16_to_enc()
- add a small optimisation in mch_errmsg_c() and mch_msg_c() (in
message.c) to only call STRLEN() if needed.
- fix a memory leak in winpty_term_and_job_init() (in terminal.c).
closes: #17191
Signed-off-by: John Marriott <basilisk@internode.on.net> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1337: Undo corrupted with 'completeopt' "preinsert" when switching buffer
Problem: Undo corrupted with 'completeopt' "preinsert" when switching
buffer or window.
Solution: Do not delete preinsert text when switching buffer or window.
(zeertzjq)
related: neovim/neovim#33581
closes: #17193
Signed-off-by: zeertzjq <zeertzjq@outlook.com> Signed-off-by: glepnir <glephunter@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
While at it, let's also document the g:yaml_recommended_style variable.
closes: #17179
Co-authored-by: Christian Brabandt <cb@256bit.org> Signed-off-by: Vincent Law <vlaw@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
Maxim Kim [Tue, 22 Apr 2025 18:11:05 +0000 (20:11 +0200)]
patch 9.1.1336: comment plugin does not support case-insensitive 'commentstring'
Problem: comment plugin does not support case-insensitive
'commentstring' (char101)
Solution: Use pattern '\c' to make the regex case-insensitive
(Maxim Kim)
fixes: #17184
closes: #17186
Signed-off-by: Maxim Kim <habamax@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1329: cannot get information about command line completion
Problem: cannot get information about command line completion
Solution: add CmdlineLeavePre autocommand and cmdcomplete_info() Vim
script function (Girish Palya)
This commit introduces two features to improve introspection and control
over command-line completion in Vim:
- Add CmdlineLeavePre autocmd event:
A new event triggered just before leaving the command line and before
CmdlineLeave. It allows capturing completion-related state that is
otherwise cleared by the time CmdlineLeave fires.
- Add cmdcomplete_info() Vim script function:
Returns a Dictionary with details about the current command-line
completion state.
These are similar in spirit to InsertLeavePre and complete_info(),
but focused on command-line mode.
**Use case:**
In [[PR #16759](https://github.com/vim/vim/pull/16759)], two examples
demonstrate command-line completion: one for live grep, and another for
fuzzy file finding. However, both examples share two key limitations:
1. **Broken history recall (`<Up>`)**
When selecting a completion item via `<Tab>` or `<C-n>`, the original
pattern used for searching (e.g., a regex or fuzzy string) is
overwritten in the command-line history. This makes it impossible to
recall the original query later.
This is especially problematic for interactive grep workflows, where
it’s useful to recall a previous search and simply select a different
match from the menu.
2. **Lack of default selection on `<CR>`**
Often, it’s helpful to allow `<CR>` (Enter) to accept the first match
in the completion list, even when no item is explicitly selected. This
behavior is particularly useful in fuzzy file finding.
----
Below are the updated examples incorporating these improvements:
```vim
set wim=noselect:lastused,full wop=pum wcm=<C-@> wmnu
autocmd CmdlineChanged : CmdComplete()
def CmdComplete()
var [cmdline, curpos] = [getcmdline(), getcmdpos()]
if getchar(1, {number: true}) == 0 # Typehead is empty (no more pasted input)
&& !pumvisible() && curpos == cmdline->len() + 1
&& cmdline =~ '\%(\w\|[*/:.-]\)$' && cmdline !~ '^\d\+$' # Reduce noise
feedkeys("\<C-@>", "ti")
SkipCmdlineChanged() # Suppress redundant completion attempts
# Remove <C-@> that get inserted when no items are available
timer_start(0, (_) => getcmdline()->substitute('\%x00', '', 'g')->setcmdline())
endif
enddef
cnoremap <expr> <up> SkipCmdlineChanged("\<up>")
cnoremap <expr> <down> SkipCmdlineChanged("\<down>")
autocmd CmdlineEnter : set bo+=error
autocmd CmdlineLeave : set bo-=error
def SkipCmdlineChanged(key = ''): string
set ei+=CmdlineChanged
timer_start(0, (_) => execute('set ei-=CmdlineChanged'))
return key != '' ? ((pumvisible() ? "\<c-e>" : '') .. key) : ''
enddef
```
These customizable snippets can serve as *lightweight* and *native*
alternatives to picker plugins like **FZF** or **Telescope** for common,
everyday workflows. Also, live grep snippet can replace **cscope**
without the overhead of building its database.
closes: #17115
Signed-off-by: Girish Palya <girishji@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1327: filetype: nroff detection can be improved
Problem: filetype: nroff detection can be improved
Solution: improve nroff detection (Eisuke Kawashima)
- explicitly check roff comments and macros typically found in manpages
- do not try to detect alphabetically-sectioned files, except for n, as
nroff
- l: > 'l' happens to be a section for historical reasons
<https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=391977>
- n: e.g. /usr/share/man/mann/Tcl.n.gz
- o: unsure (perhaps fedora-specific)
- p: unsure (perhaps fedora-specific)
closes: #17160
Signed-off-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
D. Ben Knoble [Mon, 21 Apr 2025 08:19:51 +0000 (10:19 +0200)]
runtime(doc): cross-link :| meaning :p and explain E749
E749 is given when :print (with any range) is issued on an empty buffer,
like the one you get with :new or :enew. Furthermore, due to Vi
compatibility :| is a synonym.
As a result, mappings intended to include a <bar> separator (esp. in the
case of boolean or "||") between commands can generate E749 on startup
when placed in a vimrc if the bars are not properly encoded or escaped.
[1]. Document this failure mode and synonym near the generated error,
and cross link with :help :bar. Note that one must read or scroll quite
a bit to find the mention of :| behaving like :print!
[1]: https://vi.stackexchange.com/q/46625/10604
closes: #17173
Signed-off-by: D. Ben Knoble <ben.knoble+github@gmail.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
patch 9.1.1325: tests: not checking error numbers properly
Problem: tests: not checking error numbers properly.
Solution: Add a trailing comma to avoid matching a different error
number with the same prefix (zeertzjq)
closes: #17159
Signed-off-by: zeertzjq <zeertzjq@outlook.com> Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit changes *.h files to default to C (instead of C++), and
deprecates the existing `g:c_syntax_for_h` and `g:ch_syntax_for_h`
variables in favor of a unified `g:filetype_h`, like is used for other
ambiguous file extensions.
closes: #17135
Signed-off-by: Amelia Clarke <selene@perilune.dev> Signed-off-by: Christian Brabandt <cb@256bit.org>