code: def suitify(parent):
      
      for node in parent.children:
          if node.type == syms.suite:
              # already in the prefered format, do nothing
              return
  
      # One-liners have no suite node, we have to fake one up
      for i, node in enumerate(parent.children):
          if node.type == token.COLON:
              break
      else:
          raise ValueError(u"No class suite and no ':'!")
      # Move everything into a suite node
      suite = Node(syms.suite, [Newline(), Leaf(token.INDENT, indentation(node) + indentation_step(node))])
      one_node = parent.children[i+1]
      one_node.remove()
      one_node.prefix = u''
      suite.append_child(one_node)
      parent.append_child(suite)
docs: Turn the stuff after the first colon in parent's children
      into a suite, if it wasn't already