Incorrect markup generated when a divider tag is on its own line within a paragraph

[gocom]

Prerequisites

• [x] Are you running the latest version of PHP-Textile?
• [x] $ composer update?

Problematic Textile markup

First _line_ of paragraph.
<br /><br />
Third *line* of paragraph.

Expected output

<p>First <em>line</em> of paragraph.<br />
<br />
<br />
Third <strong>line</strong> of paragraph.</p>

Actual output

First _line_ of paragraph.
<br /><br />
Third *line* of paragraph.

Used PHP code

Test suite fixture.

Additional information

PHP-Textile version: 3.7.2 PHP version: 7.3.2