typos in tutorial

[varnie]

http://dl.rust-lang.org/doc/tutorial.html

"Many languages that ofter the kinds of memory safety guarentees that Rust does have a single allocation strategy: objects live on the heap, live for as long as they are needed, and are periodically garbage collected."

it should be something like:
"Many languages that offer the kinds of memory safety guarantees that Rust does, have a single allocation strategy: objects live on the heap, live for as long as they are needed, and are periodically garbage collected."

ofter --> offer
guarentees -> guarantees
and the lack of comma after "does".

[nikomatsakis]

The phrasing is rather awkward overall. I'd suggest: "Most languages that offer strong memory safety guarantees rely upon a garbage collected heap to manage all of the objects." or something similarly short.

[lkuper]

@nikomatsakis Yeah, that's better -- I changed it.