patch 9.1.0735: filetype: salt files are not recognized

Problem:  filetype: salt files are not recognized
Solution: Detect '*.sls' files as filetype salt,
          include a syntax script (Gregory Anders)

closes: #15689

Signed-off-by: Gregory Anders <greg@gpanders.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

.github/MAINTAINERS

@@ -551,6 +551,7 @@ runtime/syntax/rng.vim			@jhradilek
 runtime/syntax/routeros.vim		@zainin
 runtime/syntax/rst.vim			@marshallward
 runtime/syntax/ruby.vim			@dkearns
+runtime/syntax/salt.vim			@gpanders
 runtime/syntax/sass.vim			@tpope
 runtime/syntax/scala.vim		@derekwyatt
 runtime/syntax/scheme.vim		@evhan

runtime/filetype.vim

@@ -2231,6 +2231,9 @@ au BufNewFile,BufRead .zprofile,*/etc/zprofile,.zfbfmarks  setf zsh
 au BufNewFile,BufRead .zshrc,.zshenv,.zlogin,.zlogout,.zcompdump,.zsh_history setf zsh
 au BufNewFile,BufRead *.zsh,*.zsh-theme,*.zunit		setf zsh
 
+" Salt state files
+au BufNewFile,BufRead *.sls			setf salt
+
 " Scheme ("racket" patterns are now separate, see above)
 au BufNewFile,BufRead *.scm,*.ss,*.sld		setf scheme
 

runtime/syntax/salt.vim

@@ -0,0 +1,16 @@
+" Vim syntax file
+" Maintainer: Gregory Anders
+" Last Changed: 2024-09-16
+
+if exists('b:current_syntax')
+  finish
+endif
+
+" Salt state files are just YAML with embedded Jinja
+runtime! syntax/yaml.vim
+unlet! b:current_syntax
+
+runtime! syntax/jinja.vim
+unlet! b:current_syntax
+
+let b:current_syntax = 'salt'

src/testdir/test_filetype.vim

@@ -635,6 +635,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     rtf: ['file.rtf'],
     ruby: ['.irbrc', 'irbrc', '.irb_history', 'irb_history', 'file.rb', 'file.rbw', 'file.gemspec', 'file.ru', 'Gemfile', 'file.builder', 'file.rxml', 'file.rjs', 'file.rant', 'file.rake', 'rakefile', 'Rakefile', 'rantfile', 'Rantfile', 'rakefile-file', 'Rakefile-file', 'Puppetfile', 'Vagrantfile'],
     rust: ['file.rs'],
+    salt: ['file.sls'],
     samba: ['smb.conf'],
     sas: ['file.sas'],
     sass: ['file.sass'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    735,
 /**/
     734,
 /**/