tag questions - Are spaces allowed? Can they be deleted?

[Rob Browning]

After reading the hg manpage, I still wasn't quite sure about the
legal tag syntax.  The manpage only says that colons are forbidden, so
are spaces acceptable, as in "Release 2.3.1"?

Also, is there any way to "delete" a tag, so that future operations
won't see it, at least not unless that same tag is reinstated by some
newer changeset?

Thanks
-- 
Rob Browning
rlb @defaultvalue.org and @debian.org; previously @cs.utexas.edu
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