From 4bec20ec1a7cde0c29d9550d244f428484fa56ab Mon Sep 17 00:00:00 2001
From: Adam Stankiewicz <sheerun@sher.pl>
Date: Wed, 7 Oct 2020 21:51:30 +0200
Subject: Fix test and loading of filetypes, closes #577

---
 syntax/html.vim | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'syntax/html.vim')

diff --git a/syntax/html.vim b/syntax/html.vim
index 633a157e..43db7575 100644
--- a/syntax/html.vim
+++ b/syntax/html.vim
@@ -19,6 +19,17 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'html5') == -1
 " Modified:     htdebeer <H.T.de.Beer@gmail.com>
 " Changes:      add common SVG elements and attributes for inline SVG
 
+" quit when a syntax file was already loaded
+if !exists("main_syntax")
+  if exists("b:current_syntax")
+    finish
+  endif
+  let main_syntax = 'html'
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
 " Patch 7.4.1142
 if has("patch-7.4-1142")
   if has("win32")
@@ -192,5 +203,13 @@ syn keyword htmlArg contained scriptlevel scriptminsize scriptsize scriptsizemul
 syn keyword htmlArg contained stretchy subscriptshift superscriptshift symmetric thickmathspace thinmathspace type valign verythickmathspace verythinmathspace
 syn keyword htmlArg contained veryverythickmathspace veryverythinmathspace voffset width xref
 
+let b:current_syntax = "html"
+
+if main_syntax == 'html'
+  unlet main_syntax
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
 
 endif
-- 
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