rust/tests/target/configs/format_macro_matchers/false.rs

// rustfmt-format_macro_matchers: false

macro_rules! foo {
    ($a: ident : $b: ty) => {
        $a(42): $b;
    };
    ($a: ident $b: ident $c: ident) => {
        $a = $b + $c;
    };
}