Steps to reproduce:

• Create a change with the autocomment /* A&B&C&D&E */ [[#A&B&C&D&E]] in summary
• Open history. The summary contains:

(→‎A&B&C&D&E: #A&B&C&D&E)

With the links http://localhost/w/index.php?title=Foo#A.26B.26C.26amp.3BD.26amp.3Bamp.3BE and http://localhost/w/index.php?title=Foo#A.26B.26C.26D.26amp.3BE

• Open the diff. The summary contains:

(→‎A&B&C&D&E: #A&B&C&D&E)

With the links #A.26B.26C.26D.26amp.3BE and #A.26B.26C.26D.26amp.3BE

The fragment encoding of the second link does not differ. Because of T103714 it is double encoded.

The fragment encoding of the first link link differ.
Expected result: The fragment encoding of the first link should not differ.