2001-04-27  Jody Goldberg <jgoldberg@home.com>

	* src/format.c (pre_parse_format) : Catch fractions too.
	(render_number) : don't pass in so many copies of flags.  Just use the
	  info struct.  Add a 'has_fraction' flag to disable rounding.
	(do_render_number) : ditto.
	(stern_brocot) : simple stern brocot tree.  Should really use an
	  adaptive precision but I am lazy.
	(format_number) : add fractions.

	* src/commands.c (cmd_autofill_redo) : changing visiblity can triger a
	  draw which requiresthat things be rendered and spanned.  Be sure to
	  complete the action BEFORE changing visibility.