From the doc:
> C419 Unnecessary list comprehension in <any/all>() prevents short-circuiting - rewrite as a generator.
>
> Using a list comprehension inside a call to any()/all() prevents short-circuiting when a True / False value is found. The whole list will be constructed before calling any()/all(), potentially wasting work.part-way. Rewrite to use a generator expression, which can stop part way.
Another new error code C418 (`dict({}) --> {}`) is also introduced, but we don't have any instance of it in the codebase.
`arc lint` also fixed a couple of import sortings in buildbot.