patch 8.0.0649: when opening a help file the filetype is set several times commit https://github.com/vim/vim/commit/9049298f8d0bbc237b7c666c7ad6cdabe738e8fc Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 22 14:16:31 2017 +0200 patch 8.0.0649: when opening a help file the filetype is set several times Problem: When opening a help file the filetype is set several times. Solution: When setting the filetype to the same value from a modeline, don't trigger FileType autocommands. Don't set the filetype to "help" when it's already set correctly.

" Vim syntax file
" Language:	SVG (Scalable Vector Graphics)
" Maintainer:	Vincent Berthoux <twinside@gmail.com>
" File Types:	.svg (used in Web and vector programs)
"
" Directly call the xml syntax, because SVG is an XML
" dialect. But as some plugins base their effect on filetype,
" providing a distinct filetype from xml is better.

if exists("b:current_syntax")
  finish
endif

runtime! syntax/xml.vim
let b:current_syntax = "svg"