Vim 80 column layout concerns

As of vim 7.3, you can use set colorcolumn=80 (set cc=80 for short).

Since earlier versions do not support this, my .vimrc uses instead:

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

See also the online documentation on the colorcolumn option.

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