This show various styles for our diff action. Style sheet: `resources/src/mediawiki.action/mediawiki.action.history.diff.css`.

This file might help us fix our diff colors which have been a recurring issues among the community for a loooong time.

Try it out in print mode, too. Style sheet: `resources/src/mediawiki.action/mediawiki.action.history.diff.print.css`.

Practical example copied from MediaWiki's HTML output:

− | Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. | + | Lorem ipsum dolor sit amet, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
− |  |
− | Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. |
| Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. |  | Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
− | Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. | + | Excepteur sint occaecat cupidatat non proident, sunt reprehenderit in voluptate in culpa qui officia deserunt mollit anim.
| + |
| + | Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Below are some basic lines being applied one or two classes. Mainly for debugging purposes.

Diff
`diff-addedline`: added line
`diff-deletedline`: deleted line
`diff-context`: context
Same as above with a `<ins>` or `<del>` child element having the `diffchange` class:
Diffchange
Added line + diffchange
Deleted line + diffchange