An error will not be printed if the parameter to `T` is not valid (- or
a number) and the token will be eaten (just like when an invalid
attribute is found)
Remove the ability of the -f switch to accept a comma-separated list of fonts. The user is expected
to use multiple times -f whenever he wants to specify one or more fonts. This has the side effect of
enabling the user to use fonts whose name contains a comma.