Add some UI tests and reword error-code docs#106557

Merged

bors merged 2 commits intorust-lang:masterfrom

Ezrashaw:ui-test-fixups-1

Jan 8, 2023

Commits on Jan 7, 2023

minor fixes for `error_codes.rs` tidy check
Ezrashaw
committed

Commits on Jan 8, 2023

doc/test: add UI test and reword docs for `E0013` and `E0015`
Ezrashaw
committed