The nowiki_text PEG rule is
nowiki_text = extToken:nowiki { var txt = Util.getExtArgInfo(extToken).dict.body.extsrc; return Util.decodeWtEntities(txt); }
and Util.getExtArgInfo() is
getExtArgInfo: function(extToken) { var name = extToken.getAttribute('name'); var options = extToken.getAttribute('options'); return { dict: { name: name, attrs: TokenUtils.kvToHash(options, true), body: { extsrc: Util.extractExtBody(extToken) }, }, }; },
It should be apparent that the nowiki_text PEG rule can be simplified as
nowiki_text = extToken:nowiki { var txt = Util.extractExtBody(extToken); return Util.decodeWtEntities(txt); }