I've made a few languages in my time, both programming languages and markup languages. One of the most valuable kinds of contributions is spotting design mistak

I've made a few languages in my time, both programming languages and markup languages. One of the most valuable kinds of contributions is spotting design mistakes, suggesting good changes, and being a discussion partner about design-related stuff. I'd bet that in this case, the change to the parser code would be trivial; the hard part is getting the design right.