List of steps to reproduce (step by step, including full links if applicable):

• load https://commons.wikimedia.org/wiki/File:Resch%26Frisch.png
• in section "File usage on other wikis" you can read the interwiki linktext: Resch&Frisch
• Bug: Ampersand & does not substitute to &

What happens?
Bug: Ampersand & does not substitute to &

What should have happened instead?
Bug: Ampersand & should substitute to &

Informations:

• Though it's a little bug but I think, I should report it.
• Bug doesn't depend on language settings.
• Bug happens using any browser.
• (I guess, debugging should be very simple.)