> the only robust way to edit \ASCIIMATH\ is to use a \WYSIWYG\ editor and hope that the parser doesn't change ever. Ouch. I wrote a couple of parsers when I

> the only robust way to edit \ASCIIMATH\ is to use a \WYSIWYG\ editor and hope that the parser doesn't change ever. Ouch. I wrote a couple of parsers when I was young and foolish without trying to specify the grammar, and it’s a good thing they didn’t get popular, because every bugfix changed the syntax and broke texts that had been working before.