title: How can I check internal links in Sphinx documentation?
body: <p>Sphinx can check external links using <a href="http://sphinx-doc.org/builders.html?highlight=linkcheck#sphinx.builders.linkcheck" rel="noreferrer">http://sphinx-doc.org/builders.html?highlight=linkcheck#sphinx.builders.linkcheck</a></p>
  
  <p>But how to check internal links?</p>