Building Strings From a Hash

[RazvanBugoi]

https://www.codewars.com/kata/51c7d8268a35b6b8b40002f2/train/javascript

[RazvanBugoi]

function solution(pairs){
  let output = [];
    for (let key in pairs) {
      output.push(`${key} = ${pairs[key]}`);
  }
      return output.join();
}