title: Matplotlib ylabels not aligned vertically (two y axes)
body: <p>I have a problem to align y axes labels when I add a second y axis.
  When I use command like bellow location of labels are not the same.</p>
  <pre><code>ax.set_ylabel('gram', fontsize='xx-small', rotation=0, loc=&quot;top&quot;)
  ax2.set_ylabel('kg', fontsize='xx-small', rotation=0, loc=&quot;top&quot;)
  </code></pre>
  <p>How to fix it?
  <a href="https://i.stack.imgur.com/D31Yc.png" rel="nofollow noreferrer">output when I use loc='top' on both axes</a></p>
  <p>I tried to use (alternatively to <strong>loc</strong>) <strong>va</strong> and <strong>ha</strong> text parameters, but this is not work correctly.</p>