Update 06-first-functions.md (#2072)

Co-authored-by: Shawn Tabrizi <[email protected]>

content/md/en/docs/tutorials/collectibles-workshop/06-first-functions.md

@@ -129,7 +129,8 @@ With errors and events out of the way, it's time to write the core logic for cre
  // retaining uniqueness.
  let unique_payload = (
  random,
- frame_system::Pallet::<T>::extrinsic_index().unwrap_or_default(),frame_system::Pallet::<T>::block_number(),
+ frame_system::Pallet::<T>::extrinsic_index().unwrap_or_default(),
+ frame_system::Pallet::<T>::block_number(),
  );
  
  // Turns into a byte array
@@ -213,4 +214,4 @@ With errors and events out of the way, it's time to write the core logic for cre
  cargo build --package collectibles
  ```
 
- Your code should now compile without any warnings.
+ Your code should now compile without any warnings.