[vim]update man ftplugin

.vim/ftplugin/man.vim

@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	man
-" Maintainer:	Nam SungHyun <namsh@kldp.org>
-" Last Change:	2007 Nov 30
+" Maintainer:	SungHyun Nam <goweol@gmail.com>
+" Last Change:	2014 Dec 29
 
 " To make the ":Man" command available before editing a manual page, source
 " this script from your startup vimrc file.
@@ -15,6 +15,12 @@ if &filetype == "man"
   endif
   let b:did_ftplugin = 1
 
+  " Ensure Vim is not recursively invoked (man-db does this)
+  " when doing ctrl-[ on a man page reference.
+  if exists("$MANPAGER")
+    let $MANPAGER = ""
+  endif
+
   " allow dot and dash in manual page name.
   setlocal iskeyword+=\.,-
 
@@ -29,6 +35,8 @@ if &filetype == "man"
     nnoremap <buffer> <c-t> :call <SID>PopPage()<CR>
   endif
 
+  let b:undo_ftplugin = "setlocal iskeyword<"
+
 endif
 
 if exists(":Man") != 2
@@ -55,7 +63,9 @@ endtry
 func <SID>PreGetPage(cnt)
   if a:cnt == 0
     let old_isk = &iskeyword
-    setl iskeyword+=(,)
+    if &ft == 'man'
+      setl iskeyword+=(,)
+    endif
     let str = expand("<cword>")
     let &l:iskeyword = old_isk
     let page = substitute(str, '(*\(\k\+\).*', '\1', '')
@@ -143,16 +153,16 @@ func <SID>GetPage(...)
   " Avoid warning for editing the dummy file twice
   setl buftype=nofile noswapfile
 
-  setl ma
+  setl ma nonu nornu nofen
   silent exec "norm 1GdG"
   let $MANWIDTH = winwidth(0)
   silent exec "r!/usr/bin/man ".s:GetCmdArg(sect, page)." | col -b"
   " Remove blank lines from top and bottom.
   while getline(1) =~ '^\s*$'
-    silent norm ggdd
+    silent keepj norm ggdd
   endwhile
   while getline('$') =~ '^\s*$'
-    silent norm Gdd
+    silent keepj norm Gdd
   endwhile
   1
   setl ft=man nomod