Splitting an early step
Moving KernelEvents constant usage to match video
Tweaking die code
Moving $event arg to correct step
Adding sections and code blocks
Adding steps that create and process 2 requests (then undo it)
Adding code blocks and splitting a chapter
Updating metadata
Adding steps to play with the YAML routing
Merge remote-tracking branch 'origin/master'

* origin/master:
  Update metadata.yml
  event subscriber