A nullspace is the result of a copied
expression. If someone
copies the space created by this expression, and pastes it, it looks like a
normal space but it is in fact still a
non-breaking space. So, unlike normal spaces in HTML, these do not get
filtered out and as many spaces as are there are shown.
According to blaaf, nullspaces are actually two characters, one with hex code A0 and the other with 20. The 20 is the space, and the A0 is a nonsense character used to separate the spaces. Also, apparently using A0 alone works...
This is pretty useless. The only useful thing about it is that it works in the Chatterbox.......