Issue 3941: Code preview dark doesn't display correctly with long lines
Assigning the background color to the pre tag did not work correctly. Moved background color to the highlight class which fixes the problem.
This fixes #3941
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Assigning the background color to the pre tag did not work correctly. Moved background color to the highlight class which fixes the problem.
This fixes #3941