spec multi-arity limit closures for sequence operator

Author: timo

S03-operators.pod

@@ -1835,6 +1835,9 @@ matching> below), the usual smartmatching rules apply.  If the
 limit is C<*>, the sequence has no limit.  If the limit is a closure,
 it will be evaluated for boolean truth on the current candidate,
 and the sequence will continue as long as the closure returns false.
+If the limit is a closure with more than 1 - or infinite - arguments
+the appropriate number of elements from the end of the sequence
+- or the whole sequence so far - are passed.
 It's quite possible for a sequence to return fewer values than are
 listed if the very first value matches the end test: