Rollup of 17 pull requests#64456

Merged

bors merged 50 commits into

rust-lang:masterfrom

Centril:rollup-ytqdwaq

Sep 14, 2019

Commits on Aug 24, 2019

Added table containing the system calls used by Instant and SystemTime.
Christian
committed

Commits on Aug 26, 2019

Update src/libstd/time.rs

DevQps
and
tesuji
authored

Commits on Sep 3, 2019

Commits on Sep 6, 2019

A few cosmetic improvements to code & comments in liballoc and libcore
alexreg
committed

Commits on Sep 8, 2019

Remove two unnecessary `clone()` calls.
nnethercote
committed

Commits on Sep 9, 2019

Commits on Sep 10, 2019

use randSecure and randABytes
bpangWR
committed

Commits on Sep 12, 2019

Commits on Sep 13, 2019

Commits on Sep 14, 2019