Greedy newlines with `return`

Created by: WreckedAvent

Input:

syntax fun = function(ctx) {
    let param = ctx.next().value;
    let body = ctx.next().value.inner();
    return #`
        function(${param}) { 
            return ${body}; 
        }
    `;
}

let add = fun x { x + 1 }

Actual:

let add_1264 = function (x_1265) {
  return;
  x_1265 + 1;
};

Expected:

let add_1264 = function (x_1265) {
  return x_1265 + 1;
};