- Passing Options instead of separated arguments for module and priority.

- Fixed strange bug that appears executing:

replace_term(_,print_expansion(Into, Pattern, GTerm, TermPos, OptionL, Text),
			       print_expansion(Into, Pattern, GTerm, TermPos, '$VAR'('OptionL'),
			       Text),[module(ref_expand)]).

  I am still not happy with the solution, that consisted in call =/2 instead to
  have unifications in the head.