Fix opa fmt location for non-key rules

[jaspervdj]

Running the following through opa fmt:

package foo

bar {
	# before
	input.bar
	# after
}

Causes the after comment to be moved outside of the rule:

package foo

bar {
	# before
	input.bar
}

# after

This was caused by skipPast in closingLoc being called even when there is no
[key] part in the rule head. Adding a third clause fixed this; it seems
like closingLoc is designed to take 0 in this case because of the
skipOpen > 0.

This did affect one other test case, where I had to add an extra newline
to separate the comment from the rule head. Without that, insertComments
(correctly, I guess) inserts:

} # some special case

Signed-off-by: Jasper Van der Jeugt m@jaspervdj.be

[srenatus]

Thank you!