title: What does three dots in a yaml/yml mean
body: <p>New with yaml, so please bare with me.</p>
  <p>I am building a azure devops pipeline. And I exported it to yaml file.</p>
  <p>It looks like this(removed some tasks/content to make it short)</p>
  <pre><code>variables:
  - name: BuildParameters.RestoreBuildProjects
    value: '**/*.csproj'
  - name: BuildParameters.TestProjects
    value: '**/*[Tt]ests/*.csproj'
  trigger:
    branches:
      include:
      - refs/heads/feature/24-Add-unit-tests
  name: $(date:yyyyMMdd)$(rev:.r)
  jobs:
  - job: Job_1
    displayName: Agent job 1
    pool:
      vmImage: ubuntu-20.04
    steps:
    - checkout: self  
    - task: PublishBuildArtifacts@1
      displayName: Publish Artifact
      condition: succeededOrFailed()
      inputs:
        PathtoPublish: $(build.artifactstagingdirectory)
        TargetPath: '\\my\share\$(Build.DefinitionName)\$(Build.BuildNumber)'
  ...
  </code></pre>
  <p>I can see three dots(...) in the end.</p>
  <p>What do they indicate? End of file? Or some other meaning.</p>