<p dir="auto">Avoid issues like the one fixed by <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="60305369" data-permission-text="Title is private" data-url="https://github.com/matplotlib/matplotlib/issues/4204" data-hovercard-type="pull_request" data-hovercard-url="/matplotlib/matplotlib/pull/4204/hovercard" href="https://github.com/matplotlib/matplotlib/pull/4204">#4204</a></p>
<p dir="auto">The linkchecker that we use at the moment does not seem to check external links hence <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="114637245" data-permission-text="Title is private" data-url="https://github.com/matplotlib/matplotlib/issues/5379" data-hovercard-type="pull_request" data-hovercard-url="/matplotlib/matplotlib/pull/5379/hovercard" href="https://github.com/matplotlib/matplotlib/pull/5379">#5379</a> and others</p>
<p dir="auto">I tried turning on the sphinx linkchecker <code class="notranslate">python make.py linkcheck</code> which seems to work but generate a fair number of redirect warnings and errors. Perhaps it is worth turning this on pr default?</p>
<p dir="auto">See <a href="https://gist.github.com/jenshnielsen/b3dceef10df743154942">https://gist.github.com/jenshnielsen/b3dceef10df743154942</a> for the present output.</p>
<p dir="auto">The linkcheck command is broken on python 3.5 but that should be fixed in the next Sphinx point release</p>