PEP 557: Deindent some bullet list items (#481)

Thanks.

pep-0557.rst

@@ -317,13 +317,13 @@ created internally, and are returned by the ``fields()`` module-level
 method (see below).  Users should never instantiate a ``Field``
 object directly.  Its documented attributes are:
 
- - ``name``: The name of the field.
+- ``name``: The name of the field.
 
- - ``type``: The type of the field.
+- ``type``: The type of the field.
 
- - ``default``, ``default_factory``, ``init``, ``repr``, ``hash``,
-   ``compare``, and ``metadata`` have the identical meaning as they do
-   in the ``field()`` declaration.
+- ``default``, ``default_factory``, ``init``, ``repr``, ``hash``,
+  ``compare``, and ``metadata`` have the identical meaning as they do
+  in the ``field()`` declaration.
 
 Other attributes may exist, but they are private.
 
@@ -633,11 +633,11 @@ surprising, the initial version of Data Classes will not support
 automatically setting ``__slots__``.  There are a number of
 workarounds:
 
-  - Manually add ``__slots__`` in the class definition.
+- Manually add ``__slots__`` in the class definition.
 
-  - Write a function (which could be used as a decorator) that
-    inspects the class using ``fields()`` and creates a new class with
-    ``__slots__`` set.
+- Write a function (which could be used as a decorator) that
+  inspects the class using ``fields()`` and creates a new class with
+  ``__slots__`` set.
 
 For more discussion, see [#]_.