rustdoc Trait impl list is strangely ordered since 1.19

[kennytm]

Compare:

• https://doc.rust-lang.org/1.18.0/std/cmp/trait.Eq.html
• https://doc.rust-lang.org/1.19.0/std/cmp/trait.Eq.html

In the beta and nightly docs, the impl for fn, tuples, arrays and primitives appear randomly. There does not seem to be any problem beyond the libcore mess.

Similar problem in:

• https://doc.rust-lang.org/1.18.0/std/primitive.array.html (looks good, impl follows declaration order)

• https://doc.rust-lang.org/1.19.0/std/primitive.array.html (randomly ordered for each group of traits)

• https://doc.rust-lang.org/1.19.0/std/primitive.array.html

• https://doc.rust-lang.org/1.19.0/std/vec/struct.Vec.html

...

[QuietMisdreavus]

Duplicate of #40905 (this has better links though since you had the opportunity to get versioned links >_>)