Affected wiki(s):
uk

Diff(s) (if applicable):
https://uk.wikipedia.org/?diff=43221531

What is happening?:
An archive link had an extra space before ".pdf". The bot had removed the extension completely.

What should happen instead?:
The bot should not make broken links even worse, at least. It would be nice for it to insert {{Verify source|type=Invalid archive URL}} (or something like that) after an affected reference instead.

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

• *

Other information: