Rollup of 9 pull requests#83294

Closed

JohnTitor wants to merge 18 commits intorust-lang:masterfrom

JohnTitor:rollup-fny8xhv

Commits on Feb 24, 2021

Reuse `std::sys::unsupported::pipe` on `hermit`
CDirkx
committed

Commits on Mar 16, 2021

Commits on Mar 17, 2021

Remove unnecessary `forward_inner_docs` hack
jyn514
committed
Fix gitattibutes for old git versions
Jethro Beekman
committed

Commits on Mar 19, 2021