Fix errors.

Author: ZeroIntensity

peps/pep-9999.rst

@@ -118,7 +118,7 @@ item. This comes with a few drawbacks:
 1. It obscures the intent of the code and increases the amount of effort
    necessary to work with asynchronous generators, because each delegation
    point becomes a loop. This damages the power of asynchronous generators.
-2. :meth:`~agend.asend`, :meth:`~agen.athrow`, and :meth:`~agen.aclose`,
+2. :meth:`~agen.asend`, :meth:`~agen.athrow`, and :meth:`~agen.aclose`,
    do not interact properly with the caller. This is the primary reason that
    ``yield from`` was added in the first place.
 3. Return values are not natively supported with asynchronous generators. The
@@ -188,7 +188,7 @@ All subgenerator delegation semantics are retained.
 
 1. :meth:`~object.__aiter__` is called to retrieve the asynchronous
    generator iterator.
-2. :meth:`~object.__asend__` is called to advance the asynchronous generator.
+2. :meth:`~agen.asend` is called to advance the asynchronous generator.
 
 ``async yield from`` is only allowed in an asynchronous generator function;
 using it elsewhere will raise a :exc:`SyntaxError`.