Update runtime files
diff --git a/runtime/syntax/lua.vim b/runtime/syntax/lua.vim
index f313c14..b398e2e 100644
--- a/runtime/syntax/lua.vim
+++ b/runtime/syntax/lua.vim
@@ -2,7 +2,7 @@
" Language: Lua 4.0, Lua 5.0, Lua 5.1 and Lua 5.2
" Maintainer: Marcus Aurelius Farias <masserahguard-lua 'at' yahoo com>
" First Author: Carlos Augusto Teixeira Mendes <cmendes 'at' inf puc-rio br>
-" Last Change: 2012 Aug 12
+" Last Change: 2022 Mar 31
" Options: lua_version = 4 or 5
" lua_subversion = 0 (4.0, 5.0) or 1 (5.1) or 2 (5.2)
" default 5.2
@@ -319,6 +319,15 @@
syn match luaFunc /\<debug\.upvalueid\>/
syn match luaFunc /\<debug\.upvaluejoin\>/
endif
+ if lua_subversion >= 3
+ "https://www.lua.org/manual/5.3/manual.html#6.5
+ syn match luaFunc /\<utf8\.char\>/
+ syn match luaFunc /\<utf8\.charpattern\>/
+ syn match luaFunc /\<utf8\.codes\>/
+ syn match luaFunc /\<utf8\.codepoint\>/
+ syn match luaFunc /\<utf8\.len\>/
+ syn match luaFunc /\<utf8\.offset\>/
+ endif
endif
" Define the default highlighting.