only one positional argument is provided, but there are two placeholders
that must be filled in.
- If :func:`!partial` is applied to an existing :func:`!partial` object,
- :data:`!Placeholder` sentinels of the input object are filled in with
- new positional arguments.
+ If :func:`!partial` is applied to an existing
+ :ref:`partial object <partial-objects>`, :data:`!Placeholder` sentinels of the
+ input object are filled in with new positional arguments.
A placeholder can be retained by inserting a new
:data:`!Placeholder` sentinel to the place held by a previous :data:`!Placeholder`: