Command line mode
              -----------------

  To run a command (from normal mode):

    :<command> args

  E.g.

    :s/foo/bar/g - search and replace

    :w <name>    - save
    :e <name>    - load
    :ls          - list open files
    :bn          - next file
    :bp          - previous file
    :<number>    - jump to line
    :q           - quit