Add re.VERBOSE flag documentation example (GH-97678)

The current re.VERBOSE documentation example leaves space for ambiguous
interpretation. One may read that spaces within the `(?:` token are
spaces inside the non-capturing group (such as `(?: )`). This patch
removes the ambiguity by including examples after the statement.
(cherry picked from commit 0ceafa7fa408b64377ea31dd5386152da19ef38a)

Co-authored-by: Athos Ribeiro <athoscribeiro@gmail.com>

diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index fd12241312211dbfe9a97c92549926f885ae1027..e7d1f0560b2ab8b0174e4f2b0bb1130722d4bfdb 100644 (file)
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -702,7 +702,8 @@ Flags
    more readable by allowing you to visually separate logical sections of the
    pattern and add comments. Whitespace within the pattern is ignored, except
    when in a character class, or when preceded by an unescaped backslash,
-   or within tokens like ``*?``, ``(?:`` or ``(?P<...>``.
+   or within tokens like ``*?``, ``(?:`` or ``(?P<...>``. For example, ``(? :``
+   and ``* ?`` are not allowed.
    When a line contains a ``#`` that is not in a character class and is not
    preceded by an unescaped backslash, all characters from the leftmost such
    ``#`` through the end of the line are ignored.