Fix deprecated wrapping of class __init__.

QuLogic · QuLogic · commit 08b62e58032c · 2020-06-08T18:54:32.000-04:00
The docstring is lost otherwise.
diff --git a/lib/matplotlib/cbook/deprecation.py b/lib/matplotlib/cbook/deprecation.py
@@ -180,7 +180,7 @@ def finalize(wrapper, new_doc):
                     obj.__doc__ = new_doc
                 except AttributeError:  # Can't set on some extension objects.
                     pass
-                obj.__init__ = wrapper
+                obj.__init__ = functools.wraps(obj.__init__)(wrapper)
                 return obj
 
         elif isinstance(obj, property):
