This show various styles for our diff action, the background being hardcoded to gray (#C0C0C0) The reference style sheet is:

resources/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.

First, show the diff mostly like it would be chown on a wiki

-
Some content deleted / replaced
+
Some content added / replacement

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 <span> child element having the diffchange class
Diffchange
Added line + diffchange
Deleted line + diffchange
Context + diffchange