Include dot in extracted file extension

Author: fatimarouchi

Sprint-2/1-key-exercises/3-paths.js

@@ -18,7 +18,7 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the ext part of the variable
 
 const dir = filePath.slice(0, lastSlashIndex);
-const ext = filePath.slice(filePath.lastIndexOf(".") + 1);
+const ext = filePath.slice(filePath.lastIndexOf("."));
 
 console.log(`The directory of ${filePath} is ${dir}`);
 console.log(`The extension of ${filePath} is ${ext}`);