**************** INPUT ****************

[Illustration: One or more Caption lines

One or more Sub-caption lines]

[Illustration: The first line of a caption.

A caption that contains balanced [square] brackets in a paragraph.]

[Square brackets can be used to group several paragraphs.

This will generate warnings as normal.]

[Illustration: An ill-formed illustration might confuse.

It generates warnings.] The opening and closing tags no longer match.

**************** WARNINGS ****************

<expected>

  <error>

    <at line="10"/>

    <at line="12"/>

    <at line="16"/>

    <text>Mismatched square brackets?</text>

  </error>

  <error>

    <at line="14"/>

    <text>Mismatched illustration tag?</text>

  </error>

</expected>