Not keyword is not highlighted

[dag]

Not keyword is not highlighted

[karlek]

It looks like the fix is to add not to fishConditional here: https://github.com/dag/vim-fish/blob/825853f4816a07e59ea2ecee1190ab6a5d9ef991/syntax/fish.vim

[dag]

No, you'd have to put it in fishLineContinuation, which would mean it gets highlighted everywhere, as an argument to any command. Note that not gets highlighted correctly if it's on its own; problem is if works like sudo and other such commands that wrap other commands. Thus, not is technically just a string argument to if and it's technically correct not to highlight it as anything other than a string argument. You could make a special syntax rule for if but that gets hairy fast with Vim syntax rules, and tends to be slow. I decided against that for vim-fish.

[dag]

The other way to do it is to drop fishLineContinuation all-together and just make things like not keywords. But then a line like echo if begin function end highlights like a bunch of keywords, even though only echo was anything other than a string argument. I decided it was more helpful to ensure that nothing is incorrectly highlighted as a keyword, than to ensure that anything that possibly ever could be a keyword always gets highlighted as such.

[karlek]

Good conclusion. It's better to not highlight keywords incorrectly.