make-regexp-replacer

Creates a function that replaces information in a string.

arg	An instance of <string>.
replace-with:	An instance of <object>. The default is #f.
case-sensitive:	An instance of <object>. The default is #f.

val	An instance of <function>.

Parsing a regexp is not cheap, so we cache the parsed regexps and only parse a string if we haven’t seen it before.