Add APL2 header and fix a typo.
Add APL2 header and fix a typo.

jwagenleitner/incubator-groovy,avafanasiev/groovy,dpolivaev/groovy,russel/groovy,traneHead/groovy-core,paulk-asert/groovy,armsargis/groovy,apache/groovy,jwagenleitner/groovy,russel/incubator-groovy,traneHead/groovy-core,apache/incubator-groovy,armsargis/groovy,shils/groovy,russel/incubator-groovy,shils/incubator-groovy,apache/incubator-groovy,jwagenleitner/groovy,shils/groovy,russel/incubator-groovy,paulk-asert/groovy,armsargis/groovy,shils/incubator-groovy,avafanasiev/groovy,armsargis/groovy,jwagenleitner/groovy,russel/groovy,russel/groovy,paulk-asert/groovy,apache/groovy,paulk-asert/incubator-groovy,dpolivaev/groovy,avafanasiev/groovy,apache/groovy,paulk-asert/groovy,avafanasiev/groovy,russel/groovy,shils/groovy,jwagenleitner/incubator-groovy,paulk-asert/incubator-groovy,jwagenleitner/incubator-groovy,dpolivaev/groovy,russel/incubator-groovy,shils/incubator-groovy,dpolivaev/groovy,shils/groovy,jwagenleitner/incubator-groovy,apache/incubator-groovy,paulk-asert/incubator-groovy,jwagenleitner/groovy,traneHead/groovy-core,apache/groovy,apache/incubator-groovy,paulk-asert/incubator-groovy,traneHead/groovy-core,shils/incubator-groovy,paulk-asert/incubator-groovy