Update runtime files
diff --git a/runtime/ftplugin/help.vim b/runtime/ftplugin/help.vim
index 9eb7214..b619a75 100644
--- a/runtime/ftplugin/help.vim
+++ b/runtime/ftplugin/help.vim
@@ -1,7 +1,7 @@
" Vim filetype plugin file
" Language: Vim help file
" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
-" Latest Revision: 2008-07-09
+" Latest Revision: 2018-12-29
if exists("b:did_ftplugin")
finish
@@ -11,9 +11,9 @@
let s:cpo_save = &cpo
set cpo&vim
-let b:undo_ftplugin = "setl fo< tw< cole< cocu<"
+let b:undo_ftplugin = "setl fo< tw< cole< cocu< keywordprg<"
-setlocal formatoptions+=tcroql textwidth=78
+setlocal formatoptions+=tcroql textwidth=78 keywordprg=:help
if has("conceal")
setlocal cole=2 cocu=nc
endif