I would like the following to give me a blank spot in a table in the notebook.
html.table([[1,None],[3,4]])
Unfortunately, it instead LaTeXs it to \mathrm{None}, which jsmath can't handle in any case. But I don't really want that behavior of latex() to change, but rather to figure out how to get the blank spot in the table without actually hacking the code of html.table (this is supposed to work on a server which is only updated once a semester).
