PEP 1 & 12: More explictly describe Post-History link format

Author: CAM-Gerlach

pep-0001.txt

@@ -660,7 +660,7 @@ The Created header records the date that the PEP was assigned a
 number, while Post-History is used to record the dates of and corresponding
 URLs to the Discussions-To threads for the PEP, with the former as the
 linked text, and the latter as the link target.
-Both headers should be in dd-mmm-yyyy format, e.g. 14-Aug-2001.
+Both sets of dates should be in ``dd-mmm-yyyy`` format, e.g. ``14-Aug-2001``.
 
 Standards Track PEPs will typically have a Python-Version header which
 indicates the version of Python that the feature will be released with.

pep-0012.rst

@@ -121,7 +121,11 @@ directions below.
 
 - Leave Post-History alone for now; you'll add dates and corresponding links
   to this header each time you post your PEP to the designated discussion forum
-  (and update the ``Discussions-To`` header with said link, as above).
+  (and update the Discussions-To header with said link, as above).
+  For each thread, use the date (in the ``dd-mmm-yyy`` format) as the
+  linked text, and insert the URLs inline as anonymous reST `hyperlinks`_,
+  with commas in between each posting.
+
   If you posted threads for your PEP on August 14, 2001 and September 3, 2001,
   the Post-History header would look like, e.g.: