Rollup of 7 pull requests#85437

Merged

bors merged 22 commits intorust-lang:masterfrom

GuillaumeGomez:rollup-3jcirty

May 18, 2021

Commits on May 14, 2021

Toggle-wrap items differently than top-doc.
jsha
committed

Commits on May 15, 2021

Implement more Iterator methods on core::iter::Repeat
lopopolo
committed
Report an error if a lang item has the wrong number of generic arguments
FabianWolff
committed

Commits on May 16, 2021

Commits on May 18, 2021