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diff --git a/runtime/syntax/synload.vim b/runtime/syntax/synload.vim
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+" Vim syntax support file
+" Maintainer:	The Vim Project <https://github.com/vim/vim>
+" Last Change:	2023 Aug 10
+" Former Maintainer:	Bram Moolenaar <Bram@vim.org>
+
+" This file sets up for syntax highlighting.
+" It is loaded from "syntax.vim" and "manual.vim".
+" 1. Set the default highlight groups.
+" 2. Install Syntax autocommands for all the available syntax files.
+
+if !has("syntax")
+  finish
+endif
+
+" let others know that syntax has been switched on
+let syntax_on = 1
+
+" Set the default highlighting colors.  Use a color scheme if specified.
+if exists("colors_name")
+  exe "colors " . colors_name
+else
+  runtime! syntax/syncolor.vim
+endif
+
+" Line continuation is used here, remove 'C' from 'cpoptions'
+let s:cpo_save = &cpo
+set cpo&vim
+
+" First remove all old syntax autocommands.
+au! Syntax
+
+au Syntax *		call s:SynSet()
+
+fun! s:SynSet()
+  " clear syntax for :set syntax=OFF  and any syntax name that doesn't exist
+  syn clear
+  if exists("b:current_syntax")
+    unlet b:current_syntax
+  endif
+
+  0verbose let s = expand("<amatch>")
+  if s == "ON"
+    " :set syntax=ON
+    if &filetype == ""
+      echohl ErrorMsg
+      echo "filetype unknown"
+      echohl None
+    endif
+    let s = &filetype
+  elseif s == "OFF"
+    let s = ""
+  endif
+
+  if s != ""
+    " Load the syntax file(s).  When there are several, separated by dots,
+    " load each in sequence.  Skip empty entries.
+    for name in split(s, '\.')
+      if !empty(name)
+	exe "runtime! syntax/" . name . ".vim syntax/" . name . "/*.vim"
+      endif
+    endfor
+  endif
+endfun
+
+
+" Handle adding doxygen to other languages (C, C++, C#, IDL, java, php, DataScript)
+au Syntax c,cpp,cs,idl,java,php,datascript
+	\ if (exists('b:load_doxygen_syntax') && b:load_doxygen_syntax)
+	\	|| (exists('g:load_doxygen_syntax') && g:load_doxygen_syntax)
+	\   | runtime! syntax/doxygen.vim
+	\ | endif
+
+
+" Source the user-specified syntax highlighting file
+if exists("mysyntaxfile")
+  let s:fname = expand(mysyntaxfile)
+  if filereadable(s:fname)
+    execute "source " . fnameescape(s:fname)
+  endif
+endif
+
+" Restore 'cpoptions'
+let &cpo = s:cpo_save
+unlet s:cpo_save