Single expression match arm blocks on one line

i think there should be an option such that if a match arm is in a block but consists of a single expression, rustfmt keeps it on a single line. i.e.

match x {
    0 => { foo(); }
    1 => { bar(); }
    _ => { baz(); }
}

which, by default, gets formatted to

match x {
    0 => {
        foo(); 
    }
    1 => {
        bar(); 
    }
    _ => {
        baz(); 
    }
}

the reason for doing this being to throw away the result of foo(), bar(), and baz(), as if they returned different types, the match expression would cause a type error

No file or test is named in the issue. Start by reproducing the two match-formatting examples and tracing rustfmt's match-arm formatting and option handling. Done means an option controls single-expression block arms on one line, with coverage for arms whose expressions return different types.