2022-01-13
This was apparently completely not a bug except in my head.
Yeah... I always use ERE (Extended Regular Expressions) normally, but it appears I made two or three mistakes here:
The "bug" is discovered is just BRE (Basic Regular Expressions)... Sorry for leading you all astray, and thank you so much to Ruario for kindly and patiently explaining my mistake ❤️
-- CC0 Björn Wärmedal