added re.UNICODE effects to insensitive flags (#1781)
diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index f01887a..d0798b7 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -486,7 +486,9 @@
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
@@ -517,8 +519,9 @@
.. 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