class Cucumber::Formatter::Pdf

This obviously doesn't work if a scenario is longer than a whole page (God forbid)
if that too high for the space left on the age in the real document, we do a page break.
This method does a 'test' rendering on a blank page, to see the rendered height of the buffer

def flush
  @scrap.start_new_page
  oldy = @scrap.y
  render @scrap
  height = (oldy - @scrap.y) + 36 # whops magic number
  if ((@pdf.y - height) < @pdf.bounds.bottom)
    @pdf.start_new_page
  end
  render @pdf
  @pdf.move_down(20)
  @buffer = []
end