message: Hide py3 names we don't need to document.
diff: @@ -1166,7 +1166,7 @@ class _ClassPageInfo(object):
  if short_name in [
  '__class__', '__base__', '__weakref__', '__doc__', '__module__',
  '__dict__', '__abstractmethods__', '__slots__', '__getnewargs__',
  - '__str__', '__repr__', '__hash__'
  + '__str__', '__repr__', '__hash__', '__reduce__'
  ]:
  continue
  @@ -1370,7 +1370,8 @@ class _ModulePageInfo(object):
  for name in member_names:
  if name in ['__builtins__', '__doc__', '__file__',
  - '__name__', '__path__', '__package__']:
  + '__name__', '__path__', '__package__',
  + '__cached__', '__loader__', '__spec__']:
  continue
  member_full_name = self.full_name + '.' + name if self.full_name else name
  