=== tests/cases/compiler/commentOnSimpleArrowFunctionBody1.ts ===
function Foo(x: any)
>Foo : (x: any) => void
>x : any
{
}
 
Foo(() =>
>Foo(() =>    // do something    127) : void
>Foo : (x: any) => void
>() =>    // do something    127 : () => number

    // do something
    127);
>127 : number