patch 8.0.1426: "gf" and <cfile> don't accept ? and & in URL commit https://github.com/vim/vim/commit/9e3dfc650190e96739abc004eb9948afa68136b4 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Dec 25 14:29:18 2017 +0100 patch 8.0.1426: "gf" and <cfile> don't accept ? and & in URL Problem: "gf" and <cfile> don't accept ? and & in URL. (Dmitrii Tcyganok) Solution: Check for a URL and allow for extra characters. (closes https://github.com/vim/vim/issues/2493)

" Vim filetype plugin
" Language:      ART-IM and ART*Enterprise
" Maintainer:    Dorai Sitaram <ds26@gte.com>
" URL:		 http://www.ccs.neu.edu/~dorai/vimplugins/vimplugins.html
" Last Change:   Apr 2, 2003

" Only do this when not done yet for this buffer
if exists("b:did_ftplugin")
  finish
endif

run ftplugin/lisp.vim

setl lw-=if
setl lw+=def-art-fun,deffacts,defglobal,defrule,defschema,for,schema,while