anchor.diff:  
   ```yml
   steps:
  -  - label: "\:hammer\:"
  +  - label: "🔨"
       command: "scripts/test"
     
     - block: "Unblock deployment?"
     
  -  - label: "\:rocket\:"
  +  - label: "🚀"
       command: "scripts/deploy"
       branches: "master"
       concurrency_group: "my-app-deploy"
       concurrency_limit: 1
   ```
   
  -Until the block step is manually unblocked either in Buildkite or via an API call, the build will be paused and the "\:rocket\:" deployment step will not run.
  +Until the block step is manually unblocked either in Buildkite or via an API call, the build will be paused and the "🚀" deployment step will not run.
   
   ## External deployment systems
   
  
positive.code:         service: "app"
          task-definition: "production-deploy/rails-app.json"
          task-family: "rails-app"
          image: "${ECR_REPOSITORY}/rails-app:${BUILDKITE_COMMIT}"
          task-role-arn: "deployer"
          deployment-configuration: "100/200"
  ```
  
negative.code: ```yaml
  steps:
    - block: "Release to production?"
    - label: "\:ecs\: 🚀"
      concurrency_group: "rails-app-deploy"
      concurrency: 1
      plugins:
  