Issue #19795: Mark up None as literal text.
diff --git a/Doc/library/logging.handlers.rst b/Doc/library/logging.handlers.rst
index 27167f0..3f5ef50 100644
--- a/Doc/library/logging.handlers.rst
+++ b/Doc/library/logging.handlers.rst
@@ -74,7 +74,7 @@
Returns a new instance of the :class:`FileHandler` class. The specified file is
opened and used as the stream for logging. If *mode* is not specified,
- :const:`'a'` is used. If *encoding* is not *None*, it is used to open the file
+ :const:`'a'` is used. If *encoding* is not ``None``, it is used to open the file
with that encoding. If *delay* is true, then file opening is deferred until the
first call to :meth:`emit`. By default, the file grows indefinitely.
@@ -154,7 +154,7 @@
Returns a new instance of the :class:`WatchedFileHandler` class. The specified
file is opened and used as the stream for logging. If *mode* is not specified,
- :const:`'a'` is used. If *encoding* is not *None*, it is used to open the file
+ :const:`'a'` is used. If *encoding* is not ``None``, it is used to open the file
with that encoding. If *delay* is true, then file opening is deferred until the
first call to :meth:`emit`. By default, the file grows indefinitely.
@@ -178,7 +178,7 @@
Returns a new instance of the :class:`RotatingFileHandler` class. The specified
file is opened and used as the stream for logging. If *mode* is not specified,
- ``'a'`` is used. If *encoding* is not *None*, it is used to open the file
+ ``'a'`` is used. If *encoding* is not ``None``, it is used to open the file
with that encoding. If *delay* is true, then file opening is deferred until the
first call to :meth:`emit`. By default, the file grows indefinitely.