title: How to ignore flake8 "line too long" errors in a heredoc
body: <p>Suppose I have a file with a heredoc with long lines:</p>
  <pre><code>    some_string = '''
  very long lines here, 20 lines each of length 500
  '''
  </code></pre>
  <p>How do I ignore all the flake8 &quot;line too long&quot; errors in that heredoc, without excluding the entire file from checking?</p>
  <p><a href="https://stackoverflow.com/questions/47876079/how-to-tell-flake8-to-ignore-comments">This answer</a> describes <code># noqa</code> for a single line, but I can't put that in the heredoc.  <a href="https://flake8.pycqa.org/en/latest/user/violations.html" rel="nofollow noreferrer">The manual</a> does not seem to describe ignoring a chunk of code.</p>