Vim设置列不起作用

Question

在Ubuntu 12.04上

:version
VIM - Vi IMproved 7.3 (2010 Aug 15, compiled May  4 2012 04:22:36)
Included patches: 1-429

:set columns=84在:set columns?给出151之后无效。为什么vim不尊重设置列？

Answer 1

if exists('+colorcolumn')
  set colorcolumn=80
else
  au BufWinEnter * let w:m2=matchadd('ErrorMsg', '\%>80v.\+', -1)
endif