title: gnuplot autotitle columnheader with whitespaces
body: <p>How can I create a legend with whitespaces in the column header with autotitle? E.g. the first two lines of the data file:</p>
  
  <pre><code>T "x high" "x low"
  0.1 3.14 0.0554
  </code></pre>
  
  <p>The legend should be:</p>
  
  <pre><code>T
  x high
  x low
  </code></pre>
  
  <p>Unfortunately gnuplot interprets it like this:</p>
  
  <pre><code>T
  x
  high
  </code></pre>
  
  <p>The quotes are simply ignored and the second column header is split into two. I couldn't find any information about this on the internet.</p>