xml:check-format produces false-positives in some mixed-content scenarios #53
Description
When checking (X)HTML documents for correct indentation, I run into some strange false-positives.
The following minimal (X)HTML document is the result of some systematic exploration on my part. It should explain where I see the false-positives, namely in certain cases of mixed content (as is used when HTML inline elements like <em> are involved):
<html>
<head>
<title>Example</title>
</head>
<body>
<p>This validates.</p>
<p>This does, <em>too.</em></p>
<p>Paragraphs with multiple lines also validate:
Like this.</p>
<p>They even validate when inline elements are involved.
Like <em>here.</em>
Nice, isn't it?</p>
<p>But we hit a bug if the inline elements covers the whole line.
<em>Like here.</em></p>
<p>Or if more text follows the inline element:
<em>Like in the next line.</em>
See?</p>
<p>But placing the closing paragraph tag on a different line is (whitespace-wise) different:
<em>This "workaround" will bite you when using p::after in CSS.</em>
</p>
</body>
</html>