GROOVY-9073: added compiler option to enable preview features - fix typo (closes #906)
GROOVY-9073: added compiler option to enable preview features - fix typo (closes #906)

paulk-asert/incubator-groovy,paulk-asert/groovy,armsargis/groovy,paulk-asert/groovy,paulk-asert/incubator-groovy,jwagenleitner/groovy,armsargis/groovy,armsargis/groovy,jwagenleitner/groovy,paulk-asert/incubator-groovy,paulk-asert/incubator-groovy,apache/groovy,jwagenleitner/incubator-groovy,shils/incubator-groovy,jwagenleitner/groovy,shils/groovy,apache/incubator-groovy,shils/incubator-groovy,paulk-asert/groovy,apache/incubator-groovy,apache/incubator-groovy,jwagenleitner/incubator-groovy,apache/groovy,shils/groovy,jwagenleitner/groovy,shils/groovy,armsargis/groovy,paulk-asert/incubator-groovy,paulk-asert/groovy,shils/incubator-groovy,shils/groovy,apache/groovy,shils/incubator-groovy,apache/groovy,apache/incubator-groovy,jwagenleitner/incubator-groovy,jwagenleitner/incubator-groovy