https://unix.stackexchange.com/questions/110251/how-to-put-current-line-at-top-center-bottom-of-screen-in-vim https://www.thegeekstuff.com/2009/03/8-essential-vim-editor-navigation-fundamentals/ https://vi.stackexchange.com/questions/14403/how-to-go-to-previous-open-buffer-from-vim-command-line
