'                       Add a Comment
  Purpose

    Comments are lines that the compiler and linker ignore entirely.

  Format

     'text of comment

      Notes:    The single quote must be in the first screen column.

                Use two single quotes at the start of the line if you
                want a line in your long entry to start with a single
                quote.

  Description

    You can add comment lines to data files and the menu link control
    file by starting the line with a single quote. A comment can be a
    whole line only; you cannot add a comment at the end of a line of
    text in a long entry, or on the same line as a bang command (e.g.,
    !short or !file). The Guides compiler and linker ignore comments.
    (They also ignore blank lines, except those found in long entries,
    where they are taken to be part of the text.)