Proof-of-concept: Docstring attrs covered by refactor.

Running the test suite on this patch demonstrates that refactoring
the boundary between NumpyDocString and SphinxDocString provides the
necessary info to (potentially) do away with the validate.Docstring
class.

Author: rossbar

numpydoc/validate.py

@@ -126,12 +126,12 @@ class Docstring:
     def __init__(self, name):
         self.name = name
         obj = self._load_obj(name)
-        self.obj = obj
-        self.code_obj = inspect.unwrap(obj)
-        self.raw_doc = obj.__doc__ or ""
-        self.clean_doc = pydoc.getdoc(obj)
-#        self.doc = NumpyDocString(self.clean_doc)
         self.doc = get_doc_object(obj)
+        self.obj = self.doc._obj
+        self.code_obj = inspect.unwrap(self.obj)
+        self.raw_doc = self.obj.__doc__ or ""
+        self.clean_doc = pydoc.getdoc(self.obj)
+#        self.doc = NumpyDocString(self.clean_doc)
 
     @staticmethod
     def _load_obj(name):