diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index dd3a1e5..ab8d35c 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1,7 +1,7 @@
 " These commands create the option window.
 "
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2020 aug 30
+" Last Change:	2020 Sep 10
 
 " If there already is an option window, jump to that one.
 let buf = bufnr('option-window')
@@ -20,7 +20,7 @@
 set cpo&vim
 
 " function to be called when <CR> is hit in the option-window
-fun! <SID>CR()
+func <SID>CR()
 
   " If on a continued comment line, go back to the first comment line
   let lnum = search("^[^\t]", 'bWcn')
@@ -47,10 +47,10 @@
   elseif match(line, '^ \=[0-9]') >= 0
     exe "norm! /" . line . "\<CR>zt"
   endif
-endfun
+endfunc
 
 " function to be called when <Space> is hit in the option-window
-fun! <SID>Space()
+func <SID>Space()
 
   let lnum = line(".")
   let line = getline(lnum)
@@ -67,14 +67,14 @@
     endif
 
   endif
-endfun
+endfunc
 
 let s:local_to_window = gettext('(local to window)')
 let s:local_to_buffer = gettext('(local to buffer)')
 
 " find the window in which the option applies
 " returns 0 for global option, 1 for local option, -1 for error
-fun! <SID>Find(lnum)
+func <SID>Find(lnum)
     let line = getline(a:lnum - 1)
     if line =~ s:local_to_window || line =~ s:local_to_buffer
       let local = 1
@@ -95,10 +95,10 @@
       let local = -1
     endif
     return local
-endfun
+endfunc
 
 " Update a "set" line in the option window
-fun! <SID>Update(lnum, line, local, thiswin)
+func <SID>Update(lnum, line, local, thiswin)
   " get the new value of the option and update the option window line
   if match(a:line, "=") >= 0
     let name = substitute(a:line, '^ \tset \([^=]*\)=.*', '\1', "")
@@ -123,7 +123,7 @@
     endif
   endif
   set nomodified
-endfun
+endfunc
 
 " Reset 'title' and 'icon' to make it work faster.
 " Reset 'undolevels' to avoid undo'ing until the buffer is empty.
@@ -159,35 +159,45 @@
 
 " These functions are called often below.  Keep them fast!
 
+" Add an option name and explanation.  The text can contain "\n" characters
+" where a line break is to be inserted.
+func <SID>AddOption(name, text)
+  let lines = split(a:text, "\n")
+  call append("$", a:name .. "\t" .. lines[0])
+  for line in lines[1:]
+    call append("$", "\t" .. line)
+  endfor
+endfunc
+
 " Init a local binary option
-fun! <SID>BinOptionL(name)
+func <SID>BinOptionL(name)
   let val = getwinvar(winnr('#'), '&' . a:name)
   call append("$", substitute(substitute(" \tset " . val . a:name . "\t" .
 	\!val . a:name, "0", "no", ""), "1", "", ""))
-endfun
+endfunc
 
 " Init a global binary option
-fun! <SID>BinOptionG(name, val)
+func <SID>BinOptionG(name, val)
   call append("$", substitute(substitute(" \tset " . a:val . a:name . "\t" .
 	\!a:val . a:name, "0", "no", ""), "1", "", ""))
-endfun
+endfunc
 
 " Init a local string option
-fun! <SID>OptionL(name)
+func <SID>OptionL(name)
   let val = escape(getwinvar(winnr('#'), '&' . a:name), " \t\\\"|")
   call append("$", " \tset " . a:name . "=" . val)
-endfun
+endfunc
 
 " Init a global string option
-fun! <SID>OptionG(name, val)
+func <SID>OptionG(name, val)
   call append("$", " \tset " . a:name . "=" . escape(a:val, " \t\\\"|"))
-endfun
+endfunc
 
 let s:idx = 1
 let s:lnum = line("$")
 call append("$", "")
 
-fun! <SID>Header(text)
+func <SID>Header(text)
   let line = s:idx . " " . a:text
   if s:idx < 10
     let line = " " . line
@@ -198,15 +208,15 @@
   call append(s:lnum, line)
   let s:idx = s:idx + 1
   let s:lnum = s:lnum + 1
-endfun
+endfunc
 
 " Get the value of 'pastetoggle'.  It could be a special key.
-fun! <SID>PTvalue()
+func <SID>PTvalue()
   redir @a
   silent set pt
   redir END
   return substitute(@a, '[^=]*=\(.*\)', '\1', "")
-endfun
+endfunc
 
 " Restore the previous value of 'cpoptions' here, it's used below.
 let &cpo = s:cpo_save
@@ -240,8 +250,7 @@
 call <SID>Header("moving around, searching and patterns")
 call append("$", "whichwrap\tlist of flags specifying which commands wrap to another line")
 call <SID>OptionG("ww", &ww)
-call append("$", "startofline\tmany jump commands move the cursor to the first non-blank")
-call append("$", "\tcharacter of a line")
+call <SID>AddOption("startofline", gettext("many jump commands move the cursor to the first non-blank\ncharacter of a line"))
 call <SID>BinOptionG("sol", &sol)
 call append("$", "paragraphs\tnroff macro names that separate paragraphs")
 call <SID>OptionG("para", &para)
@@ -286,15 +295,14 @@
 
 
 call <SID>Header("tags")
-call append("$", "tagbsearch\tuse binary searching in tags files")
+call <SID>AddOption("tagbsearch", gettext("use binary searching in tags files"))
 call <SID>BinOptionG("tbs", &tbs)
 call append("$", "taglength\tnumber of significant characters in a tag name or zero")
 call append("$", " \tset tl=" . &tl)
 call append("$", "tags\tlist of file names to search for tags")
 call append("$", "\t(global or local to buffer)")
 call <SID>OptionG("tag", &tag)
-call append("$", "tagcase\thow to handle case when searching in tags files:")
-call append("$", "\t\"followic\" to follow 'ignorecase', \"ignore\" or \"match\"")
+call <SID>AddOption("tagcase", gettext("how to handle case when searching in tags files:\n\"followic\" to follow 'ignorecase', \"ignore\" or \"match\""))
 call append("$", "\t(global or local to buffer)")
 call <SID>OptionG("tc", &tc)
 call append("$", "tagrelative\tfile names in a tags file are relative to the tags file")
@@ -1446,7 +1454,7 @@
 	\ call <SID>unload() | delfun <SID>unload
 augroup END
 
-fun! <SID>unload()
+func <SID>unload()
   delfun <SID>CR
   delfun <SID>Space
   delfun <SID>Find
@@ -1457,7 +1465,7 @@
   delfun <SID>BinOptionG
   delfun <SID>Header
   au! optwin
-endfun
+endfunc
 
 " Restore the previous value of 'title' and 'icon'.
 let &title = s:old_title