anchor.diff:      "started_at": "2015-05-09T21:05:59.874Z",
       "finished_at": "2015-05-09T21:05:59.874Z",
       "meta_data": { },
  +    "pull_request": { },
       "pipeline": {
         "id": "849411f9-9e6d-4739-a0d8-e247088e9b52",
         "url": "https://api.buildkite.com/v2/organizations/my-great-org/pipelines/my-pipeline",
  
positive.code: <table>
  <tbody>
    <tr><th><code>author</code></th><td>A hash with a <code>"name"</code> and <code>"email"</code> key to show who created this build.<br><em>Default value: the user making the API request</em>.</td></tr>
    <tr><th><code>env</code></th><td>Environment variables to be made available to the build.<br><em>Default value:</em> <code>{}</code>.</td></tr>
    <tr><th><code>meta_data</code></th><td>A hash of meta-data to make available to the build.<br><em>Default value:</em> <code>{}</code>.</td></tr>
    <tr><th><code>ignore_pipeline_branch_filters</code></th><td>Run the build regardless of the pipeline’s branch filtering rules. Step branch filtering rules will still apply.<br><em>Default value:</em> <code>false</code>.</td></tr>
    <tr><th><code>clean_checkout</code></th><td>Force the agent to remove any existing build directory and perform a fresh checkout.<br><em>Default value:</em> <code>false</code>.</td></tr>
    </tbody>
  </table>
  
  
negative.code:   "started_at": "2015-05-09T21:05:59.874Z",
    "finished_at": "2015-05-09T21:05:59.874Z",
    "meta_data": { },
    "pull_request": { },
    "pipeline": {
      "id": "849411f9-9e6d-4739-a0d8-e247088e9b52",
      "url": "https://api.buildkite.com/v2/organizations/my-great-org/pipelines/my-pipeline",
  