Rollup of 6 pull requests#65177

Closed

Centril wants to merge 24 commits intorust-lang:masterfrom

Centril:rollup-yupt5qs

Commits on Oct 2, 2019

remove 'as_str' when it's already a str type.
Guanqun Lu
committed
add test files
Guanqun Lu
committed
comment fixes
Guanqun Lu
committed
add FIXME and use 'span_label'
Guanqun Lu
committed
fix unit tests
Guanqun Lu
committed
typo fix in the code
Guanqun Lu
committed

Commits on Oct 4, 2019

Commits on Oct 5, 2019

Commits on Oct 7, 2019