It the following correct:

	pc1:paul {201} cat xxx
	704:1
	704:2
	704:3
	pc1:paul {202} grep '^704:\(2\)\{0,0\}$' xxx
	704:2
	pc1:paul {203}

I would expect the regular expression to say "match anything that
starts with '704:' followed by exactly zero occurrences of '2',
followed by end-of-line.  Instead, it seems to be treating the {0,0}
as though it were {1,1}.

There's no restriction in the re_format(7) man page that says the
bounds cannot be {0,0}.


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