But that's what TDD is for. If the test fails for 55, you just add a return 56, and then all is well.

He went back after the war to get a knife from the Hitler Youth, engrave it with his name, then used it to torture Algerians during the algerian independence war.

Yes, it's just the next manga arc (chapters 39 to 52) right after the anime ended.

Spoilers obviously : ::: spoiler Reze Arc wiki page https://chainsaw-man.fandom.com/wiki/Bomb_Girl_arc :::

Well, the small remains of the right just fractured themselves during this election over working with the far right, so the margins are pretty small on the right of Macron's deputy's.