- takes a malformed ASCII-drawn table as stdin or file, for example:
    +-----+-----+
    | foo | bar |
    +-----+-----+
    | a long cell | short |
    | x | longer cell ? |
    +--+--+

- outputs a well-formed table:
    +-------------+---------------+
    |     foo     |      bar      |
    +-------------+---------------+
    | a long cell |     short     |
    |      x      | longer cell ? |
    +-------------+---------------+