code tables with empty contents makes the row not appear. Usually,
we'd put an there so it does show, but that would be bad for
the preprocessor examples where I really want to have the table
contents reflect the exact file contents.
So another solution is to use a 'newline element, but then latex barfs
because it's not happy with a \\ inside a tt macro. The hacked
"solution" is to have the newline element not be inside a tt element
-- latex doesn't barf now, but it does have one extra newline as a
result since it doesn't hide the newline to begin with.
A better solution is to find a way to make table cells in html not be
hidden when they have no contents, maybe through some css magic.
svn: r14206
