style-guide: Add chapter about formatting for nightly-only syntax#111119

Merged

bors merged 2 commits intorust-lang:masterfrom

compiler-errors:style-nightly

Jul 6, 2023

Commits on Jul 5, 2023

Clarify that style guide does not cover nightly-only features
compiler-errors
committed
style-guide: Add chapter for nightly formatting

joshtriplett
and
compiler-errors
committed