Fix some misuses of Sphinx roles and one typo
diff --git a/Doc/howto/logging.rst b/Doc/howto/logging.rst
index a7d6024..5ff0d74 100644
--- a/Doc/howto/logging.rst
+++ b/Doc/howto/logging.rst
@@ -412,10 +412,10 @@
:meth:`Logger.error`, and :meth:`Logger.critical` all create log records with
a message and a level that corresponds to their respective method names. The
message is actually a format string, which may contain the standard string
- substitution syntax of :const:`%s`, :const:`%d`, :const:`%f`, and so on. The
+ substitution syntax of ``%s``, ``%d``, ``%f``, and so on. The
rest of their arguments is a list of objects that correspond with the
- substitution fields in the message. With regard to :const:`**kwargs`, the
- logging methods care only about a keyword of :const:`exc_info` and use it to
+ substitution fields in the message. With regard to ``**kwargs``, the
+ logging methods care only about a keyword of ``exc_info`` and use it to
determine whether to log exception information.
* :meth:`Logger.exception` creates a log message similar to