feat: add --check flag to cargo fmt (#3890)
feat: add --check flag to cargo fmt (#3890)


aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,SingingTree/rustfmt,rust-lang/rustfmt,aidancully/rust,graydon/rust,aidancully/rust,rust-lang/rustfmt,SingingTree/rustfmt