Sync SPEC 7 with scipy (#397)

ref: scipy/scipy#23276

Co-authored-by: Brigitta Sipőcz <bsipocz@gmail.com>
Co-authored-by: Jarrod Millman <jarrod.millman@gmail.com>

Author: 3 people

spec-0007/transition_to_rng.py

@@ -1,5 +1,6 @@
 import numpy as np
 import functools
+import inspect
 import warnings
 
 
@@ -160,6 +161,17 @@ def wrapper(*args, **kwargs):
 
             return fun(*args, **kwargs)
 
+        # Add the old parameter name to the function signature
+        wrapped_signature = inspect.signature(fun)
+        wrapper.__signature__ = wrapped_signature.replace(
+            parameters=[
+                *wrapped_signature.parameters.values(),
+                inspect.Parameter(
+                    old_name, inspect.Parameter.KEYWORD_ONLY, default=None
+                ),
+            ]
+        )
+
         return wrapper
 
     return decorator