Documentation for RTDualSet is lying.
Issue #23
new
In https://bitbucket.org/fenics-project/fiat/src/faffacc2cec53e1500c50272cb6594b6d06a51f1/FIAT/raviart_thomas.py?at=master&fileviewer=file-view-default#raviart_thomas.py-78 it says "and internal moments against polynomials", but actually the code uses also point evaluations in the interior.
It was me. I forgot to log in.