in pegTokenizer.pegjs, we have
urltext = ( & [/A-Za-z] al:autolink { return al; }
We should not start test for autolink when encountering a "/" because it will always be falsy:
autolink = ! <extlink> // this must be a word boundary, so previous character must be non-word ! { return /\w/.test(input[endOffset() - 1] || ''); }