Multi-word tags not linked correctly from file pages

Hey,

Noticed a small issue when browsing through tags. When viewing a specific file, if one of its tags contains multiple words, then clicking on it leads to a URL with the words delimited by “+” signs. This will always show zero results… but if the "+"s are replaced by spaces (or their encoded equivalents, “%20”), it works as expected.

Curiously this doesn’t happen on artist pages (or on the tag search) - there, multi-word tags lead to space-delimited URLs which work just fine.

As an example, most of my own pieces are tagged “total dos collection”. If you view one and click the tag in the sidebar, you’ll end up at “https://16colo.rs/tags/content/total+dos+collection” (wrong), but the same tag works correctly elsewhere (“tags/content - total dos collection”).