Fix autodoc_docstring_signature support for __init__ and __new__ #9518
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Feature or Bugfix
Purpose
The
MethodDocumenter.get_docmethod added by51ae283 prevents
DocstringSignatureMixinfrom working correctly for__init__and__new__methods. Additionally, the__new__docstring was not obtainedcorrectly.
This commit checks for
self._new_docstringsbeing set, and alsocorrects the logic for obtaining the
__new__docstring.There still remains the issue that when the class signature is
obtained from the signature of
__init__or__new__, only the realsignature is used, due to the use of
sphinx.util.inspect.signature;the
autodoc_docstring_signatureoption does not have any effect.