Selected elements can be used a dividers blocks:
  input: |
    <br>

    <hr>

    <img>
  expect: |
    <br>

    <hr>

    <img>

Textile-like syntax within divider blocks is not parsed:
  input: |
    The following _strong_ is not so.

    <hr title="Hello *strong* world!">
  expect: |
    <p>The following <em>strong</em> is not so.</p>

    <hr title="Hello *strong* world!">

Dividers can be escaped by starting the block with whitespace, but it also escapes wrapping:
  input: |
    <img src="image.jpg">

     <img src="image.jpg">
  expect: |
    <img src="image.jpg">

     <img src="image.jpg">

Dividers accept attributes:
  input: |
    <img src="image.jpg">
  expect: |
    <img src="image.jpg">

Dividers accept trailing whitespace within the tag:
  input: |
    <br >

    <br   >
  expect: |
    <br >

    <br   >

Dividers can be self-closing:
  setup:
    setHtmlType: xhtml
  input: |
    <hr/>

    <br />
  expect: |
    <hr/>

    <br />

Dividers can be paired containers:
  setup:
    setHtmlType: xhtml
  input: |
    <hr></hr>

  expect: |
    <hr></hr>

Dividers do not terminate extended blocks:
  input: |
    bc.. <hr>

    <br>

    <img src="image.jpg">

    p. Paragraph.
  expect: |
    <pre><code>&lt;hr&gt;

    &lt;br&gt;

    &lt;img src=&quot;image.jpg&quot;&gt;</code></pre>

    <p>Paragraph.</p>

Textile-block containing divider content is not a divider:
  input: |
    p. <img src="image.jpg">
  expect: |
    <p><img src="image.jpg"></p>

Divider matching does not care about character encoding:
  input: |
    <img src="福島駅.jpg">
  expect: |
    <img src="福島駅.jpg">

Divider matching is case-insensitive:
  input: |
    <HR>

    <hR>
  expect: |
    <HR>

    <hR>

Divider can not wrap content:
  input: |
    <img>Content.</img>

  expect: |
    <p><img>Content.</img></p>

Divider that wraps content will not be wrapped if its not a phrasing element:
  input: |
    <hr>Content.</hr>
  expect: |
    <hr>Content.</hr>

Divider can not contain any other content:
  input: |
    <img src="image.jpg"> *Content*.
  expect: |
    <p><img src="image.jpg"> <strong>Content</strong>.</p>

Divider blocks can consist of multiple tags:
  input: |
    <br><br><br><hr>
  expect: |
    <br><br><br><hr>

Dividers must be closed:
  input: |
    <hr

    <br

    <hr</hr>
  expect: |
    <p>&lt;hr</p>

    <p>&lt;br</p>

    <p><hr</hr></p>

Textile syntax that generates divider-like tags is not a divider:
  input: |
    !image.jpg!
  expect: |
    <p><img alt="" src="image.jpg" /></p>

Dividers are sanitized in restricted mode:
  setup:
    setRestricted: true
  input: |
    <img src="image.jpg">

    !image.jpg!
  expect: |
    <p>&lt;img src=&#8220;image.jpg&#8221;&gt;</p>

    <p><img alt="" src="image.jpg" /></p>