Constant HELP_TEXT 

const HELP_TEXT: &str = r"
Diff Commands:

          m : toggle ignoring metadata
          d : toggle show only different entries
          s : compute information for (sub-)dirs
          I : show information about snapshots

General Commands:

      q,Esc : exit
      Enter : enter dir
  Backspace : return to parent dir
          ? : show this help page

 ";