i newspaper, January 17, 2020
Au revoir means ‘Until I see you again’ or ‘See you soon’. The French word for a permanent farewell, as needed here, is ‘Adieu’. This is a rotten headline in another way too, because it is simply a short form of the intro. Talking of the intro, you rarely need ‘ever’. ‘Last day’ is sufficient.
A better headline might be:
Goodbye to all that: Euro
MPs’ historic Brexit day
which also has the advantage of not having the killer words ‘European Parliament’ in it.
One thing that annoys me about the i newspaper is its style of having a one-word tag above the headline. At least get it right – this story is about Strasbourg, not Brussels.