Remove superfluous .Ek.

Drop a superfluous .Pp.

Whitespace nits.

More and more .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

WARNSify

RCS id police.

spray(8) manpage, from Jim Jegers.
Expanded and edited by myself.