Log Message:
py36-html-docs: Update py36-html-docs to 3.6.4

Changes:
3.6.4
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Documentation
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- bpo-32105: Added asyncio.BaseEventLoop.connect_accepted_socket
  versionaddded marker.
- bpo-31537: Fix incorrect usage of ``get_history_length`` in readline
  documentation example code. Patch by Brad Smith.
- bpo-30085: The operator functions without double underscores are preferred
  for clarity. The one with underscores are only kept for back-
  compatibility.