IGNORECASE
Perform case-insensitive matching; expressions like ``[A-Z]`` will match
- lowercase letters, too. This is not affected by the current locale.
+ lowercase letters, too. This is not affected by the current locale. To
+ get this effect on non-ASCII Unicode characters such as ``ü`` and ``Ü``,
+ add the :const:`UNICODE` flag.
.. data:: L
.. data:: U
UNICODE
- Make ``\w``, ``\W``, ``\b``, ``\B``, ``\d``, ``\D``, ``\s`` and ``\S`` dependent
- on the Unicode character properties database.
+ Make the ``\w``, ``\W``, ``\b``, ``\B``, ``\d``, ``\D``, ``\s`` and ``\S``
+ sequences dependent on the Unicode character properties database. Also
+ enables non-ASCII matching for :const:`IGNORECASE`.
.. versionadded:: 2.0