Reported by entrez: it was possible for #overview to show a line of
just "." if a temple was known and its altar was unknown and no other
features such as thrones or fountains were known on the level.
It now lists "M temples and N altars" when both are present and the
case that yielded "." becomes "a temple". That's an improvement but
there might be edge cases it gets wrong. A listing of "a temple and
an altar" is ambiguous because there isn't any way to tell whether the
altar it mentions is inside the temple. That seems acceptable to me.
I think it should include more alignment information about temples and
altars, instead of just adding "to <your god>" when all known altars
are of hero's alignment, but this doesn't attempt to address that.
55650666ed