anchor.diff:  ```yml
   - group: "Setup"
     steps:
  -    - command: "buildkite agent pipeline upload"
  +    - commands:
  +      - "buildkite agent pipeline upload"
  +      - "abc.sh"
   ```
   {: codeblock-file="pipeline.yml"}
   
  
positive.code: ```
  {: codeblock-file="pipeline.yml"}
  
  These groups will be merged into one in the UI, and the `"docker build"` step will be added to the existing group.
  
  ```yml
  - group: "Setup"
    steps:
      - command: "buildkite agent pipeline upload"
  - group: "Setup"
    steps:
        - command: "docker build"
  ```
  {: codeblock-file="pipeline.yml"}
  
  
negative.code: ```
  {: codeblock-file="pipeline.yml"}
  
  Remember that a wait step placed inside a set of `commands` will be ignored because <code>wait</code> is not a command.
  
  ## Group merging
  
  