& @@

  Syntax: @@ <args>

  This command does nothing, therefore it is useful for putting
  comments into a MUX program.  Be careful that ()'s and {}'s in the 
  (otherwise ignored) arguments are nested correctly, lest your 
  command-ending ; be trapped inside.
 
  Example:
  @va me=$foobar *:@fo #1234=%0;@@ This controls my foobar puppet.