Fix tuple types in sphinx docstrings

src/drf_yasg/inspectors/base.py

@@ -203,7 +203,7 @@ class FieldInspector(BaseInspector):
             - :class:`.Schema` if `swagger_object_type` is :class:`.Schema`
             - :class:`.Items` if `swagger_object_type` is  :class:`.Parameter` or :class:`.Items`
 
-        :rtype: tuple[callable,(type[openapi.Schema] or type[openapi.Items])]
+        :rtype: (function,type[openapi.Schema] or type[openapi.Items])
         """
         assert swagger_object_type in (openapi.Schema, openapi.Parameter, openapi.Items)
         assert not isinstance(field, openapi.SwaggerDict), "passed field is already a SwaggerDict object"

src/drf_yasg/inspectors/view.py

@@ -344,7 +344,7 @@ class SwaggerAutoSchema(ViewInspector):
 
         :param description: the full description to be analyzed
         :return: summary and description
-        :rtype: tuple[str,str]
+        :rtype: (str,str)
         """
         # https://www.python.org/dev/peps/pep-0257/#multi-line-docstrings
         summary = None
@@ -362,7 +362,7 @@ class SwaggerAutoSchema(ViewInspector):
         """Return an operation summary and description determined from the view's docstring.
 
         :return: summary and description
-        :rtype: tuple[str,str]
+        :rtype: (str,str)
         """
         description = self.overrides.get('operation_description', None)
         summary = self.overrides.get('operation_summary', None)