Highlight lines in vim

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To highlight lines that exceed more than 80 characters, we can colorize the extraneous characters.

Add to your ~/.vimrc

highlight OverLength ctermbg=darkred ctermfg=white guibg=#FFD9D9
augroup vimrc_autocmds
    autocmd!
    autocmd BufEnter,WinEnter * call matchadd('OverLength', '\%>80v.\+', -1)
augroup END

Every line which is longer than 80 characters will result in: