Rollup of 8 pull requests#67356

Merged

bors merged 22 commits intorust-lang:masterfrom

Centril:rollup-paaw3ju

Dec 16, 2019

Commits on Dec 11, 2019

Improve `str` prefix/suffix comparison
ranma42
committed

Commits on Dec 12, 2019

Prefer encoding the char when checking for string prefix/suffix
ranma42
committed
Minor cleanup in `Pattern::{is_prefix_of,is_suffix_of}` for `char`
ranma42
committed

Commits on Dec 16, 2019