[doc] Simplifying logging example (remove doctest)

doc/logging.rst

@@ -15,21 +15,14 @@ We provide a single a method in this library to help setup a particular
 documentation of :py:func:`expose.logging.setup` explains in details what it
 does.  To use it in an application, follow this pattern:
 
-.. doctest::
-   :options: +NORMALIZE_WHITESPACE
-
-   >>> import logging
-   >>> import io
-   >>> messages = io.StringIO()  # captures stdout/stderr
-   >>> from expose.logging import setup
-   >>> logger = setup("mypackage", format="%(levelname)s: %(message)s", low_level_stream=messages, high_level_stream=messages)
-   >>> logger.setLevel(logging.INFO)  # set log-level as you wish
-   >>> logger.info("test message")  # use at application level, normally
-   >>> messages.seek(0)
-   0
-   >>> print(messages.read())
-   INFO: test message
+.. code-block:: python
 
+   import logging
+   from expose.logging import setup
+   logger = setup("mypackage", format="%(levelname)s: %(message)s")
+   logger.setLevel(logging.INFO)  # set log-level as you wish
+   logger.info("test message")  # use at application level, normally
+   INFO: test message
 
 
 To help with setting the base logger level via the CLI, we provide a