User blog comment:Harbumz/Introducing Vignette, Wikia's New Thumbnailer/@comment-452-20150212014153/@comment-452-20150222141509

Yes, removing the extra / fixes it on a single wiki.

As these /s are there by default, obviously fixing them one by one is not the optimal solution.

There are many wiki problems that can be fixed on a single wiki, but that doesn't mean there is not an underlying global problem which needs to be fixed.