GROOVY-8654: fixed documentation build command (closes #761)
GROOVY-8654: fixed documentation build command (closes #761)

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