title: How to get gnuplot to use a centered multi-line title, with left-aligned lines?
body: <p>I want my (gnu)plot to have a multi-line title. I would like the title to be <em>centered</em> (i.e. the distance from the center of the widest title line to the edges should be equal), but not to have each line centered <em>independently</em> of the others, which is the default behavior; I want to have the title lines left-aligned and <em>centered only as a block</em>.</p>
  
  <p>How can I achieve this?</p>