DOC: use code block for shorter error message

Author: cpcloud

doc/source/missing_data.rst

@@ -602,11 +602,12 @@ You can also operate on the DataFrame in place
    argument to ``replace`` (``to_replace``) must match the type of the value
    being replaced type. For example,
 
-   .. ipython:: python
-      :okexcept:
+   .. code-block:: python
 
       s = Series([True, False, True])
-      s.replace({'a string': 'new value', True: False})
+      s.replace({'a string': 'new value', True: False})  # raises
+
+      TypeError: Cannot compare types 'ndarray(dtype=bool)' and 'str'
 
    will raise a ``TypeError`` because one of the ``dict`` keys is not of the
    correct type for replacement.