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" Vim plugin for using Vim as manpager.
" Maintainer: Enno Nagel <ennonagel+vim@gmail.com>
" Last Change: 2022 Jun 05
command! -nargs=0 MANPAGER call s:ManPager() | delcommand MANPAGER
function s:ManPager()
" global options, keep these to a minimum to avoid side effects
if &compatible
set nocompatible
endif
if exists('+viminfofile')
set viminfofile=NONE
endif
set noswapfile
setlocal ft=man
runtime ftplugin/man.vim
setlocal buftype=nofile bufhidden=hide iskeyword+=: modifiable
" Emulate 'col -b'
silent! keepj keepp %s/\v(.)\b\ze\1?//ge
" Remove ansi sequences
silent! keepj keepp %s/\v\e\[%(%(\d;)?\d{1,2})?[mK]//ge
" Remove empty lines above the header
call cursor(1, 1)
let n = search(".*(.*)", "c")
if n > 1
exe "1," . n-1 . "d"
endif
setlocal nomodifiable nomodified readonly nowrite
syntax on
endfunction
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