Missing white space between <tspan>s

If you have two <tspan>'s on separate lines that are indented (and without 'x' or 'dx' attributes, which Inkscape generated text uses), there should be a white space between the displayed text of the <tspan>'s. See:

 http://www.w3.org/TR/SVG/text.html#WhiteSpace

For example:
   <text>
    <tspan>My first span.</tspan>
    <tspan>My second span.</tspan>
   </text>
Should be rendered as:
  My first span. My second span.
But is being rendered as:
  My first span.My second span.

The newline's are stripped out but the indention should be collapsed to one remaining space.