Doc: Fixes small error in the task part

[gamazeps]

The doc says that the type system catches error like trying to use a mutable variable used by another task, where it is the borrow checker taht does it (it seems far more logical)

[gamazeps]

r? @steveklabnik

[steveklabnik]

The borrow checker isn't exactly part of the type system, but it kind of is. I'm not sure this distinction matters.

I'm on mobile, or I'd check myself: have we mentioned the 'borrow checker' anywhere yet in the guide this far?

[gamazeps]

Yup we have already mentioned the borrow checker in the guide.

It seems to me that the distinction matters a lot, as the notion of borrowing has nothing to do with types (to my knowledge Rust is the only strongly typed language with notion of borrowing).
Beeing extremely precise on this notions seems rather important to me as it is a core concept of the language.

[steveklabnik]

Lifetimes are kind of type parameters. It depends 😉

Anyway, this is not wrong, and we did explain it earlier, so seems good. Thanks!

[steveklabnik]

Lifetimes are kind of type parameters. It depends 😉

Anyway, we did explain it earlier, so seems good. Thanks!

[gamazeps]

@steveklabnik is @bors tired ? (I don't really know how he works :/ )

[steveklabnik]

@gamazeps yeah, every once in a while the queue gets REALLY full. @alexcrichton is doing a rollup though, so this shouldget in soonish.