title: pass in multiple arguments in lettuce test step
body: <p>generally each lettuce test step takes 1 parameter, is there a way to pass in multiple arguments in a single step ?</p>
  
  <p>like, can I have this:</p>
  
  <pre><code>@step('I have the number (\d+) and character (\w+)')
  def have_the_number(step, number, character ):
      world.number = int(number)
      world.character = str(character)
  </code></pre>