no bug, just a little improvement suggestion. When using the standardize() method of the String object, german umlauts ä and ö are folded to a and o, while ü is mapped to ue. The expected behaviour would be:
ä => a
ö => o
ü => u
This can be simply done by changing the following lines:
Hope this finds its way into the library.
All the best,
Fixed by #1144