Get rid of the leading hyphen!

After looking at the examples in the link proposals I find that I
cannot face the prospect of working for the next 10 or 20 years with

We should get rid of the hyphen in front of XML in reserved names and

"-XML" is ugly, it's hard to type, it looks dumb, and it doesn't
really pollute the name space any less than any other reserved string.
Reserve "XML" and be done with it.