Fix isProperFraction function to correctly handle equal absolute values of numerator and denominator

Author: alexandru-pocovnicu

Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -14,7 +14,7 @@ function isProperFraction(numerator, denominator) {
   }
   if (
     Math.abs(numerator) > Math.abs(denominator) ||
-    numerator === denominator
+    Math.abs(numerator) === Math.abs(denominator)
   ) {
     return false;
   }