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

(cherry picked from commit 36a0b1d0dddbdf324d98071ea31e7e9151eea6d5)

Co-authored-by: Stanley <46876382+slateny@users.noreply.github.com>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index 8e279049a1c2d2ff9ff3c7f928bc4981fbc6fe0f..67056995652240082e42dd894ab30c0764c66c84 100644 (file)
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -589,10 +589,9 @@ 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;