gcd.js refactoring

Author: user-3a9afc676c66a4ad

src/games/gcd.js

@@ -7,7 +7,7 @@ const questionGame = 'Find the greatest common divisor of given numbers.';
 const questionRound = () => {
   let number1 = randomNumber(1, 10);
   let number2 = randomNumber(1, 10);
-  const question = `Question:${number1} ${number2}`;
+  const question = `Question: ${number1} ${number2}`;
 
   let result = 0;
   while (number2 !== 0) {