Consider the following piece of reST::
.. automodule:: sphinx.ext.autosummary
:members:
.. autosummary::
sphinx.ext.autosummary.Autosummary
This inserts an autosummary after the module docstring, but before
the members of the module. Without the change in this commit, this
would fail because `import_by_name` would attempt to import::
sphinx.ext.autosummary.sphinx.ext.autosummary.Autosumary
because the prefix (from the parent) is `sphinx.ext.autosummary`,
and the name is `sphinx.ext.autosummary.Autosummary`, which is able
to be imported from `sphinx.ext.autosummary`, but is not the way
that anyone would want to refer to it.
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
