Fix issue 5890: (property subclass shadows __doc__ string) by inserting
the __doc__ into the subclass instance __dict__. The fix refactors
property_copy to call property_init in such a way that the __doc__
logic is re-executed correctly when getter_doc is 1, thus simplifying
property_copy.
diff --git a/Misc/NEWS b/Misc/NEWS
index c8ae918..268a9bb 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@
Core and Builtins
-----------------
+- Issue #5890: in subclasses of 'property' the __doc__ attribute was
+ shadowed by classtype's, even if it was None. property now
+ inserts the __doc__ into the subclass instance __dict__.
+
- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
sequences. Patch by Nick Barnes and Victor Stinner.