[issue20194] Add :deprecated: marker to formatter module docs

[Roundup Robot]

New submission from Roundup Robot:

New changeset 30013dbb5bc2 by Brett Cannon in branch 'default':
Issues #20194,20195: Add missing :deprecated: markers to some module
http://hg.python.org/cpython/rev/30013dbb5bc2

----------
nosy: +python-dev

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20194>
_______________________________________