gh-69929: re docs: Add more specific definition of \w (#92015)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index f7d46586cf7570560bc655e3b3bff2db64f4efb8..cbee70b01d9f46d1d67c2a4470104aa27863eb91 100644 (file)
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -591,10 +591,9 @@ character ``'$'``.
 
 ``\w``
    For Unicode (str) patterns:
-      Matches Unicode word characters; this includes most characters
-      that can be part of a word in any language, as well as numbers and
-      the underscore. If the :const:`ASCII` flag is used, only
-      ``[a-zA-Z0-9_]`` is matched.
+      Matches Unicode word characters; this includes alphanumeric characters (as defined by :meth:`str.isalnum`)
+      as well as the underscore (``_``).
+      If the :const:`ASCII` flag is used, only ``[a-zA-Z0-9_]`` is matched.
 
    For 8-bit (bytes) patterns:
       Matches characters considered alphanumeric in the ASCII character set;