Thanks! I thought I had the most straight-forward code there is and there were no edge cases that I hit. But I didn't use regex or something, just manual patter

Thanks! I thought I had the most straight-forward code there is and there were no edge cases that I hit. But I didn't use regex or something, just manual pattern matching like gp. Imho regexes are overused for such stuff, precisely because they might do a lot of things you don't think about and are usually a lot slower than manually implementing what you want.