Apply suggestions from code review

Co-authored-by: Brian Schubert <brianm.schubert@gmail.com>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

Author: 3 people

peps/pep-0828.rst

@@ -105,7 +105,7 @@ in asynchronous generators:
 3. https://discuss.python.org/t/66886
 
 Additionally, this design decision has `come up
-<https://stackoverflow.com/questions/47376408>`_ on StackOverflow.
+<https://stackoverflow.com/questions/47376408>`__ on StackOverflow.
 
 
 Subgenerator delegation is useful for asynchronous generators
@@ -188,7 +188,7 @@ All subgenerator delegation semantics are retained.
 
 1. :meth:`~object.__aiter__` is called to retrieve the asynchronous
    generator iterator.
-2. :meth:`~agen.asend` is called to advance the asynchronous generato
+2. :meth:`~agen.asend` is called to advance the asynchronous generator
    iterator.
 
 ``async yield from`` is only allowed in an asynchronous generator function;
@@ -329,7 +329,7 @@ Reference Implementation
 ========================
 
 A reference implementation of this PEP can be found
-`here <https://github.com/python/cpython/compare/main...zerointensity:cpython:async-yield-from>`_.
+`here <https://github.com/python/cpython/compare/main...zerointensity:cpython:async-yield-from>`__.
 
 
 Rejected Ideas
@@ -345,7 +345,7 @@ Thanks to Bartosz Sławecki for aiding in the development of the reference
 implementation of this PEP. In addition, the :exc:`StopAsyncIteration`
 changes in addition to the support for non-``None`` return values inside
 asynchronous generators were largely based on Alex Dixon's design from
-`python/cpython#125401 <https://github.com/python/cpython/pull/125401>`_
+`python/cpython#125401 <https://github.com/python/cpython/pull/125401>`__
 
 
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