Re: Document NULL

I think that idea (changing all the docs) is a complete nonstarter
because people would not understand why the results they get don't
look like what it says in the docs.  Of course, we could fix that
by changing the factory default for \pset null, but that seems like
even more of a nonstarter.

Then all null values would be the same, and the user would understand what it means, because it's painted differently.
And then would be an unique way of appearance, on this page and all others