Get rid of @Cell
Unindent stringifier() in tasks guide
auto merge of #13084 : Havvy/rust/master, r=alexcrichton

The indentation looks off in the guide because the main() function is not shown, so I'm dedenting the visible function.
Implement vtable support for autoderef.
Closes #13042.
auto merge of #13085 : edwardw/rust/saddest-cell, r=cmr
Implement cross-crate support for autoderef.
Closes #13044.
auto merge of #13087 : eddyb/rust/fix-autoderef, r=cmr

Implements vtable support for generic Deref impls with trait bounds.
Also fixes cross-crate inlining when using autoderef.
make std::managed private

This removes two tests built on `managed::refcount`, but these issues
are well-covered elsewhere for non-managed types.
auto merge of #13089 : thestinger/rust/managed, r=Aatch

This removes two tests built on `managed::refcount`, but these issues
are well-covered elsewhere for non-managed types.
use TotalEq for HashMap

Closes #5283
auto merge of #13088 : thestinger/rust/hashmap, r=cmr

Closes #5283