def cell_latex(self):
        latex = Latex(self.code)
        self.kernel.Display(latex)
        self.evaluate = False
A very basic test for the Header.update method--I'd like to add a
dataset/ETHPy150Open Calysto/metakernel/metakernel/magics/latex_magic.py/LatexMagic.cell_latex--crossover with--dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/tests/test_core.py/TestCore.test_update_header_card