input: |
  NOTE: **Custom
  multiline
  title.** Body.

  NOTE: **Custom
  multiline
  title.**
  Body.
output: |-
  <div class="admonition note">
    <p class="admonition-title">
      Custom
  multiline
  title
    </p>
    <p>
      Body.
    </p>
  </div>
  <div class="admonition note">
    <p class="admonition-title">
      Custom
  multiline
  title
    </p>
    <p>
      Body.
    </p>
  </div>
