Since the lexer was originally created the ' and : runes have been deprecated, and the -_=?! runes have been added.

Uxntal reference: https://wiki.xxiivv.com/site/uxntal.html

The original example piano.tal file has been updated with a newer reference file (used with permission), as the old one included a macro which conflicted with the new - rune, and used fairly old uxntal coding style.