Update src/makefun/main.py

Co-authored-by: Sylvain Marié <sylvain.marie@schneider-electric.com>

Author: lucaswiman

src/makefun/main.py

@@ -964,6 +964,7 @@ def _get_args_for_wrapping(wrapped, new_sig, remove_args, prepend_args, append_a
 
     # attributes: start from the wrapped dict, add '__wrapped__' if needed, and override with all attrs.
     all_attrs = copy(getattr_partial_aware(wrapped, '__dict__'))
+    # PEP362: always set `__wrapped__`, and if signature was changed, set `__signature__` too
     all_attrs.setdefault("__wrapped__", wrapped)
     if has_new_sig:
         all_attrs["__signature__"] = func_sig