handling of wrong tag nesting

[volker]

<math>
<math>
0=1
</math>
</math>

simplified from: http://en.wikibooks.org/wiki/Linear_Algebra/Inverses

the outer math tags should be ignored. maybe this is fixed, if #63 is fixed

currently the result is:

Paragraph '': 2 children ''
             Math u'\n': 0 children ''
             u'0=1\n' ''

[ralf]

<math>

[ralf]

they are ignored in this case according to the result you gave. or what did you mean?

[volker]

the current result is an empty math tag followed by a text node with the math-stuff. thats not what we want.

instead the outer math tags should be ignored, only the inner tags should be "used".

I guess if #63 is fixed, everything is fine. because the first math tag would forcefully be closed when the second one opens.