Is there a reason you removed this? Forward slash was included per [OWASP recommendation](https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet#RULE_.231_-_HTML_Escape_Before_Inserting_Untrusted_Data_into_HTML_Element_Content) and consistency with Underscore.js and many other libraries.