title: PEP8: continuation line over-indented for visual indent
body: <p>I have this line of code which goes over the line and when testing for pep8 errors I get:
  line too long. So to try and fix this I used slash('\') but then I get continuation line over-indented for visual indent. What can I do to fix this?</p>
  
  <p><img src="https://i.stack.imgur.com/osXJl.png" alt="enter image description here"></p>
  
  <p>Things I've tried:</p>
  
  <pre><code>if first_index &lt; 0 or second_index &gt; \
     self._number_of_plates - 1:
      raise ValueError
  
  continuation line over-indented for visual indent
  
  if first_index &lt; 0 \ 
     or second_index &gt; \
     self._number_of_plates - 1:
      raise ValueError
  
  continuation line over-indented for visual indent
  
  if first_index &lt; 0 or \
     second_index &gt; self._number_of_plates - 1:
      raise ValueError
  
  continuation line over-indented for visual indent
  
  if first_index \
     &lt; 0 or second_index \
     &gt; self._number_of_plates - 1:
       raise ValueError
  
  continuation line over-indented for visual indent
  </code></pre>