Issue #24314: Merge doc links from 3.5

diff --cc Doc/library/enum.rst
Simple merge

diff --cc Doc/library/functions.rst
Simple merge

diff --cc Doc/library/inspect.rst
Simple merge

diff --cc Doc/library/stdtypes.rst
Simple merge

diff --cc Doc/reference/datamodel.rst
Simple merge

diff --cc Doc/whatsnew/2.1.rst
Simple merge