&do_cmd_email:  Adjust to use a font similar to that used in the printed
	representation.

&my_module_index_helper:  Change to be only used for defining markup.  Don't
	prepend an <A NAME=...> to the result; use the containing page as
	the module target for the index.

&ref_module_index_helper:  New function.  Used only for references to modules
	described elsewhere.  Generate the right target.

&init_myformat:  Set the anchor_mark to an empty string; this avoids junky
	"&#160;"'s in the text, which could really screw up vertical spacing
	when that's all that's in a paragraph.

&do_cmd_seemodule:  Insert markup to jump right to the referred-to module.