rustfmt: Use struct-like enum variants for Operation
rustfmt: Use struct-like enum variants for Operation

aidancully/rust,SingingTree/rustfmt,aidancully/rust,aidancully/rust,studoot/rustfmt,rust-lang/rustfmt,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,Emilgardis/rustfmt,rust-lang/rustfmt,aidancully/rust,graydon/rust,graydon/rust,Emilgardis/rustfmt,graydon/rust,SingingTree/rustfmt,graydon/rust,flutterhash/rustfmt,studoot/rustfmt