Closes #1904: [Napoleon] parses restructuredtext references in fields/params BEFORE splitting on colon

tests/test_ext_napoleon_docstring.py

@@ -356,6 +356,22 @@ Returns:
 :returns: an example instance
           if available, None if not available.
 :rtype: :py:class:`~.module.submodule.SomeClass`
+"""
+        actual = str(GoogleDocstring(docstring))
+        self.assertEqual(expected, actual)
+
+    def test_xrefs_in_return_type(self):
+        docstring = """Example Function
+
+Returns:
+    :class:`numpy.ndarray`: A :math:`n \\times 2` array containing
+    a bunch of math items
+"""
+        expected = """Example Function
+
+:returns: A :math:`n \\times 2` array containing
+          a bunch of math items
+:rtype: :class:`numpy.ndarray`
 """
         actual = str(GoogleDocstring(docstring))
         self.assertEqual(expected, actual)
@@ -696,3 +712,25 @@ arg_ : type
         actual = str(NumpyDocstring(docstring, config, app, "class"))
 
         self.assertEqual(expected, actual)
+
+    def test_xrefs_in_return_type(self):
+        docstring = """
+Example Function
+
+Returns
+-------
+:class:`numpy.ndarray`
+    A :math:`n \\times 2` array containing
+    a bunch of math items
+"""
+        expected = """
+Example Function
+
+:returns: A :math:`n \\times 2` array containing
+          a bunch of math items
+:rtype: :class:`numpy.ndarray`
+"""
+        config = Config()
+        app = mock.Mock()
+        actual = str(NumpyDocstring(docstring, config, app, "method"))
+        self.assertEqual(expected, actual)