input: |
  > NOTE:
  > Foo.
  >
  > a
  > Bar.
  >
  > WARNING:
  > Baz.
output: |-
  <div class="admonition note">
    <p class="admonition-title">
      Note
    </p>
    <p>
      Foo.
    </p>
    <p>
      a
  Bar.
    </p>
    <p>
      WARNING:
  Baz.
    </p>
  </div>
