Update document and add news entry

Author: aisk

Doc/library/winreg.rst

@@ -772,7 +772,8 @@ will print ``Yes`` if the handle is currently valid (has not been closed or
 detached).
 
 The object also support comparison semantics, so handle objects will compare
-true if they both reference the same underlying Windows handle value.
+true if they both reference the same underlying Windows handle value. Closed
+handle objects (those with a handle value of zero) always compare equal.
 
 Handle objects can be converted to an integer (e.g., using the built-in
 :func:`int` function), in which case the underlying Windows handle value is
@@ -815,3 +816,6 @@ integer handle, and also disconnect the Windows handle from the handle object.
    will automatically close *key* when control leaves the :keyword:`with` block.
 
 
+.. versionchanged:: next
+   Handle objects are now compared by their underlying Windows handle value
+   instead of object identity.

Misc/NEWS.d/next/Library/2025-11-01-00-34-53.gh-issue-140826.JEDd7U.rst

@@ -0,0 +1,2 @@
+Now :class:`winreg.PyHKEY` objects are compared by their underlying Windows
+registry handle value instead of their object identity.