https://doc.wikimedia.org/ is a [Doxygen](https://en.wikipedia.org/wiki/Doxygen) installation.
MediaWiki core includes a "Fallback" skin. It's what you see if somehow `wgDefaultSkin` isn't available. It isn't visible to users. (Try it by adding `?useskin=fallback` to a page, see for example: https://www.mediawiki.org/wiki/MediaWiki?useskin=fallback
Because `SkinFallback` is in MediaWiki core (see the [code search results](https://codesearch.wmcloud.org/core/?q=SkinFallback)), it shows up in Doxygen's class diagrams that are otherwise helpful for `class Skin`, but the generated documentation for [[ https://doc.wikimedia.org/mediawiki-core/master/php/classSkinFallback.html | SkinFallback ]] and [[ https://doc.wikimedia.org/mediawiki-core/master/php/classSkinFallbackTemplate.html | SkinFallbackTemplate ]] is terrible.
It only needs a few changes:
- merge the two comment blocks at the top of these files
- add the explanation I gave above
- improve the confusing overlapping statements
- "Skin template for the fallback skin
- "SkinTemplate class for the fallback skin
I don't think the files should be marked `\@ingroup Skins` since it's not relevant to other skins.