

If I understand correctly, it’s a different kind of “immutable”, since distros like Bazzite provide premade immutable images you use and anything else you need you install using alternative means, whereas NixOS is an immutable image generator that requires you to set up your own definitions for the image, but also lets you install software by adding it to that image.
Oh I would hope not, it’s good practice to not let the person writing the code merge it in, to get a fresh pair of eyes on the code before it goes in.
Though in a way you could say he “fixed a bug” by merging a bugfix written by somebody else, but that feels like a failure of attribution.