moved type definitons completly to overloaded methods

plugins/module_utils/module.py

@@ -57,14 +57,24 @@ class AnsibleModule(object):
     def diff(self, diff: Dict[str, str]):
         pass
 
+    @overload
     def diff(
         self,
-        diff: Optional[Dict[str, str]] = None,
-        *,
         before: Optional[str] = None,
         after: Optional[str] = None,
         before_header: Optional[str] = None,
         after_header: Optional[str] = None,
+    ):
+        pass
+
+    def diff(  # type: ignore
+        self,
+        diff=None,
+        *,
+        before=None,
+        after=None,
+        before_header=None,
+        after_header=None,
     ):
         """adds the special return value "diff". This allows Modules to present the changes of files to the caller. it takes care of the special semantics of the return value"""
         if "diff" not in self.result: