PEP 685: Update headers & fix reST syntax, links & punctuation

pep-0685.rst

@@ -7,7 +7,7 @@ Status: Draft
 Type: Standards Track
 Content-Type: text/x-rst
 Created: 08-Mar-2022
-Post-History: 08-Mar-2022
+Post-History: `08-Mar-2022 <https://discuss.python.org/t/14141>`__
 
 
 Abstract
@@ -64,10 +64,10 @@ Runs of ``.`` and ``-``, unlike PEP 503, do **not** get collapsed,
 e.g. ``..`` stays the same.
 
 For pip 22, its
-"extra normalisation behaviour is quite convoluted and erratic" [pip-erratic]_,
+`"extra normalisation behaviour is quite convoluted and erratic" <pip-erratic_>`__,
 and so its use is not considered.
 
-.. [pip-erratic] https://discuss.python.org/t/what-extras-names-are-treated-as-equal-and-why/7614/10?
+.. _pip-erratic: https://discuss.python.org/t/7614/10
 
 
 Specification
@@ -99,7 +99,7 @@ tools SHOULD warn the user.
 Tools SHOULD warn users when an invalid extra name is read and not use
 the name to avoid ambiguity.
 Tools MAY raise an error instead of a warning when reading an
-invalid name if they so desire.
+invalid name, if they so desire.
 
 
 Backwards Compatibility
@@ -108,20 +108,20 @@ Backwards Compatibility
 Moving to :pep:`503` normalization and :pep:`508` name acceptance, it
 allows for all preexisting, valid names to continue to be valid.
 
-Based on research looking at a collection of wheels on PyPI [pypi-results]_,
+Based on `research looking at a collection of wheels on PyPI <pypi-results_>`__,
 the risk of extra name clashes is limited to 73 clashes when considering
 even invalid names,
 while *only* looking at valid names leads to only 3 clashes:
 
-1. dev-test: dev_test, dev-test, dev.test
-2. dev-lint: dev-lint, dev.lint, dev_lint
-3. apache-beam: apache-beam, apache.beam
+* ``dev-test``: ``dev_test``, ``dev-test``, ``dev.test``
+* ``dev-lint``: ``dev-lint``, ``dev.lint``, ``dev_lint``
+* ``apache-beam``: ``apache-beam``, ``apache.beam``
 
 By requiring tools writing core metadata to only record the normalized name,
 the issue of preexisting, invalid extra names should be diminished over
 time.
 
-.. [pypi-results] https://discuss.python.org/t/pep-685-comparison-of-extra-names-for-optional-distribution-dependencies/14141/17?u=brettcannon
+.. _pypi-results: https://discuss.python.org/t/14141/17
 
 
 Security Implications
@@ -162,7 +162,7 @@ Rejected Ideas
 Using setuptools 60's normalization
 -----------------------------------
 
-Initially this PEP proposed following setuptools to try and minimize
+Initially, this PEP proposed following setuptools to try to minimize
 backwards-compatibility issues.
 But after checking various wheels on PyPI,
 it became clear that standardizing **all** naming on :pep:`508` and