fix

vlib/builtin/array_test.v

@@ -148,4 +148,10 @@ fn test_push_many() {
 	assert a[5] == 6
 }
 
+fn test_reverse() {
+	mut a := [1, 2, 3, 4]
+	mut b := ['test', 'array', 'reverse']
 
+	assert a.reverse() == [4, 3, 2, 1]
+	assert b.reverse() == ['reverse', 'array', 'test']
+}