downgrade from Sphinx-specific markup to plain docutils

pep-0443.txt

@@ -62,9 +62,7 @@ User API
 
 To define a generic function, decorate it with the ``@singledispatch``
 decorator. Note that the dispatch happens on the type of the first
-argument, create your function accordingly:
-
-.. code-block:: pycon
+argument, create your function accordingly::
 
   >>> from functools import singledispatch
   >>> @singledispatch
@@ -75,9 +73,7 @@ argument, create your function accordingly:
 
 To add overloaded implementations to the function, use the
 ``register()`` attribute of the generic function. It takes a type
-parameter:
-
-.. code-block:: pycon
+parameter::
 
   >>> @fun.register(int)
   ... def _(arg, verbose=False):
@@ -93,18 +89,14 @@ parameter:
   ...         print(i, elem)
 
 To enable registering lambdas and pre-existing functions, the
-``register()`` attribute can be used in a functional form:
-
-.. code-block:: pycon
+``register()`` attribute can be used in a functional form::
 
   >>> def nothing(arg, verbose=False):
   ...     print("Nothing.")
   ...
   >>> fun.register(type(None), nothing)
 
-When called, the function dispatches on the first argument:
-
-.. code-block:: pycon
+When called, the function dispatches on the first argument::
 
   >>> fun("Hello, world.")
   Hello, world.