Sadly many libraries get RFC and standards implementations wrong. I've run into similar edge cases before, and it's always frustrating to see it either not impl

Sadly many libraries get RFC and standards implementations wrong. I've run into similar edge cases before, and it's always frustrating to see it either not implemented at all (best case), or overlooked due to simplified implementation (e.g. regex instead of parsing), or that there's a bug report that's closed as wontfix because it would be too complicated to fix.