如何让vim显示BOM为

<feff>sku;qty
productsku;1

当我下载文件并用vi打开它时,我看不到< feff>

当我这样做时：我可以看到< feff>但我现在也看到了^ M.

<feff>sku;qty^M
productsku;1^M

但我不想设置^ M.我只是想看看< feff>.
另一个例子是< 80>我在另一个文件中.

我怎样才能设置vim来向我展示那些特殊的字符？

?编辑?

命令vi –version告诉我以下内容：

VIM - Vi IMproved 7.0 (2006 May 7,compiled Aug  4 2010 07:21:08)

它还说system-vimrc-file是/ etc / vimrc,它有以下内容：

if v:lang =~ "utf8$" || v:lang =~ "UTF-8$"
   set fileencodings=utf-8,latin1
endif

set term=builtin_ansi
set nocompatible    " Use Vim defaults (much better!)
set bs=indent,eol,start     " allow backspacing over everything in insert mode
"set ai         " always set autoindenting on
"set backup     " keep a backup file
set viminfo='20,"50    " read/write a .viminfo file,don't store more
            " than 50 lines of registers
set history=50      " keep 50 lines of command line history
set ruler       " show the cursor position all the time

" Only do this part when compiled with support for autocommands
if has("autocmd")
  augroup redhat
    " In text files,always limit the width of text to 78 characters
    autocmd BufRead *.txt set tw=78
    " When editing a file,always jump to the last cursor position
    autocmd BufReadPost *
     if line("'"") > 0 && line ("'"") <= line("$") |
       exe "normal! g'"" |
     endif
  augroup END
endif

if has("cscope") && filereadable("/usr/bin/cscope")
   set csprg=/usr/bin/cscope
   set csto=0
   set cst
   set nocsverb
   " add any database in current directory
   if filereadable("cscope.out")
      cs add cscope.out
   " else add database pointed to by environment
   elseif $CSCOPE_DB != "" 
      cs add $CSCOPE_DB
   endif
   set csverb
endif

" Switch syntax highlighting on,when the terminal has colors
" Also switch on highlighting the last used search pattern.
if &t_Co > 2 || has("gui_running")
  syntax on 
  set hlsearch
endif

if &term=="xterm"
     set t_Co=8
     set t_Sb=^[[4%dm
     set t_Sf=^[[3%dm
endif

我复制了它并将其添加到我的?/ .vimrc中,但这些更改都没有达到我想要的效果.如果有一些情况,我可能不得不玩这些.

有没有人知道是否还有其他文件,而不是在编辑文件时会读取的vi –version中所述的文件？