You can clone with
Currently _.escape only replaces these:&, <, >, ", '
And _.unescape only replaces these:&, <, >, ", '
What are your thoughts on supporting more replacements?
_.escape / _.unescape are mainly helpful in dealing with the 5 characters significant in XML (and therefore in HTML) for preventing XSS in templates. What's your use case for adding more? It should be pretty easy to add them in yourself if you need it.
Also check out #1189 for some recent discussion and background.