Solution for @pre @code content

[riffm]

There are cases, when text content is needed "as is" (with special indention). I think that we need to introduce two more tokens for this case. Begin mark of such content and end mark.

@pre
    {! -- indention of first token defines where this content will be insert
class A(object):
    pass
    !} -- last token is needed only to define the end of content

Everything between these tokens are just text and obeys the rules of text inside tags.

[riffm]

Look at issue #35