[3.13] gh-111259: Document idiomatic RE pattern (?s:.) that matches any character...

(cherry picked from commit a2f6f7dd26128b834c6e66fe1ceac3ac751143f5)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index bce36660afcada554d9f62bbd0a5921c320ad9bd..cc979fe66f7fe96d758adff3eb317e40a5c3e9e9 100644 (file)
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -101,7 +101,7 @@ The special characters are:
 ``.``
    (Dot.)  In the default mode, this matches any character except a newline.  If
    the :const:`DOTALL` flag has been specified, this matches any character
-   including a newline.
+   including a newline.  ``(?s:.)`` matches any character regardless of flags.
 
 .. index:: single: ^ (caret); in regular expressions