Steps to reproduce

1. Open a Wikidata item, e.g. https://www.wikidata.org/wiki/Q80?safemode=1#sitelinks-special (safe mode makes sure that the bug is not in a gadget or site script).
2. Look at the title of the sitelink box and notice it says “Multilingual sites (1 entry)”.
3. Click on the edit link of the sitelink box.

Actual result

4. Notice that it says “Multilingual sites (1 entry”; the closing parentheses is missing.

Expected result

4. The closing parentheses is still there.

Additional information

Before	After

• The parentheses doesn’t come back if I save or cancel the edit.
• After some debugging, I suspect that the bug is in rEWBA view/resources/jquery/wikibase/jquery.wikibase.sitelinklistview.js:298 (at de30eeba0f5e), namely that jQuery doesn’t like the self-closing tag <span/>. This may be a change caused by the recent removal of the jQuery 3 migration layer (T280944).