Update runtime files.

runtime/ftplugin/awk.vim

@@ -1,9 +1,10 @@
 " Vim filetype plugin
 " Language:	awk, nawk, gawk, mawk
 " Maintainer:	Antonio Colombo <azc100@gmail.com>
-" Last Change:	2017 Feb 17
+" Last Change:	2020 Sep 28
 
 " This plugin was prepared by Mark Sikora
+" This plugin was updated as proposed by Doug Kearns
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
@@ -13,6 +14,42 @@ endif
 " Don't load another plugin for this buffer
 let b:did_ftplugin = 1
 
-let b:undo_ftplugin = "setl commentstring<"
+let s:cpo_save = &cpo
+set cpo&vim
 
+setlocal comments=:#
 setlocal commentstring=#\ %s
+setlocal formatoptions-=t formatoptions+=croql
+
+setlocal define=function
+setlocal suffixesadd+=.awk
+
+let b:undo_ftplugin = "setl fo< com< cms< def< sua<" .
+		    \ " | unlet! b:browsefilter"
+
+" TODO: set this in scripts.vim?
+if exists("g:awk_is_gawk")
+  setlocal include=@include
+  setlocal suffixesadd+=.gawk
+  if has("unix") || has("win32unix")
+    setlocal formatprg=gawk\ -f-\ -o/dev/stdout
+    let b:undo_ftplugin .= " | setl fp<"
+  endif
+
+  let path = system("gawk 'BEGIN { printf ENVIRON[\"AWKPATH\"] }'")
+  let path = substitute(path, '^\.\=:\|:\.\=$\|:\.\=:', ',,', 'g') " POSIX cwd
+  let path = substitute(path, ':', ',', 'g')
+
+  let &l:path = path
+  let b:undo_ftplugin .= " | setl inc< path<"
+endif
+
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+  let b:browsefilter = "Awk Source Files (*.awk,*.gawk)\t*.awk;*.gawk\n" .
+		     \ "All Files (*.*)\t*.*\n"
+endif
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim: nowrap sw=2 sts=2 ts=8