KW03 → KW_03, but use regex for much more cases

[raabf]

Luckily you already changed to the new pdf naming scheme for this week in b87604d84631ccc9924d908bbcbcbdc65a050b52, but they seem to not pay attention to consistent naming—probably the name will differ soon again or they switch regularly between multiple naming schemes.

To counter those multiple possibilities and be prepared for future, I started to use regexes instead of fixed strings.

check out some examples (and add more if you want, the regex should work for many cases I think)

[srehwald]

thanks, using regexes is good idea!

[raabf]

You're welcome 😄