Fix a typo (closes #554)
Fix a typo (closes #554)

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