Update primitives.md

Author: sadanandpai

challenges/primitives.md

@@ -819,15 +819,17 @@ myTag`Note: ${person} is a member of following communities: ${membership}`;
 
 ```js
 try {
-	  callAPI(); // It will throw an Error
+    // Below statement will throw an Error
+    callAPI();
 } catch (error) {
-	  throw new Error(error); // ReferenceError: callAPI is not defined
+    // Create a new error and throw
+    throw new Error(error); 			// ReferenceError: callAPI is not defined
 } finally {
-	  console.log("I will execute no matter what happened in try or catch");
+    console.log('I will execute no matter what happened in try or catch');
 }
 ```
-###### Notes
 
+###### Notes
 - `try` can be chained with `catch` block or `finally` block
 - `try..catch` only works synchronously and for runtime errors