Handle multiple spaces in case conversion

Author: fatimarouchi

Sprint-3/3-mandatory-implement/2-cases.js

@@ -15,7 +15,7 @@
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
 function toUpperSnakeCase(words) {
-  return words.toUpperCase().replaceAll(" ", "_");
+  return words.toUpperCase().trim().split(/\s+/).join("_");
 }
 
 console.log(toUpperSnakeCase("hello there"));