HashMap documentation inconsistency

[brprice]

The online docs (https://doc.rust-lang.org/std/collections/hash_map/index.html) claim that

• for the module: "A hash map implemented with linear probing and Robin Hood bucket stealing."
  (from https://github.com/rust-lang/rust/blob/master/src/libstd/collections/mod.rs#L436)
• for the HashMap struct: "A hash map implemented with quadratic probing and SIMD lookup."
  (from https://github.com/rust-lang/rust/blob/master/src/libstd/collections/hash/map.rs#L17)

I suspect the module docs are out of date, and should have been updated in cf46bd5.

[TheSamsa]

I'll do that, if it is fine to be done by a non english native speaker.