[issue12266] str.capitalize contradicts oneself

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

Do you mean  "if (!Py_UNICODE_ISLOWER(*s)) {"  (with the '!')?

This sounds fine to me, but with this approach all the uncased characters will go through a Py_UNICODE_TO* macro, whereas with the current code only the cased ones are converted.  I'm not sure this matters too much though.

OTOH if the non-lowercase cased chars are always either upper or titlecased, checking for both should be equivalent.

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