augroup reopen_at_last_cursor
  autocmd!
  " Reopening a file at last curson position
  au FocusGained * set relativenumber
  au FocusLost * set norelativenumber
  au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$")
          \ | exe "normal! g'\"" | endif
augroup END