gh-106318: Fix incorrectly rendered code block in `str.isalnum()` docs (GH-144718)

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 0e5f5dc39e72778fe3b6b657340fa8abe88548b3..d4540e0b81987169bd9c223dc4d2201be3f437ea 100644 (file)
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -2183,7 +2183,7 @@ expression support in the :mod:`re` module).
    Return ``True`` if all characters in the string are alphanumeric and there is at
    least one character, ``False`` otherwise.  A character ``c`` is alphanumeric if one
    of the following returns ``True``: ``c.isalpha()``, ``c.isdecimal()``,
-   ``c.isdigit()``, or ``c.isnumeric()``. For example::
+   ``c.isdigit()``, or ``c.isnumeric()``. For example:
 
    .. doctest::