Henry S. Thompson added the comment:
[One year and 2 days later... :-[
Is this fixed in 3.9? If not, the Versions list above should be updated.
The failure of lower() to preserve 'alpha-ness' is a serious bug, it causes
significant failures in e.g. Turkish NLP, and it'
Henry S. Thompson added the comment:
This issue is also implicated in a failure of isalpha and friends.
Easy way to see this is to compare
>>> isalpha('İ')
True
>>> isalpha('İ'.lower())
False
This results from the use of a combining character to encode lo
