GROOVY-6617: joint compiler fails to compile groovy class implemented java interface
improve javadoc
GROOVY-6404: Incorrect stubs for enums without constants
GROOVY-6302: Stub generator chokes on multi-dimensional arrays
GROOVY-4248: JavaStubGenerator doesn't generate annotations available in Groovy code (support Parameter annotations)
GROOVY-6855: Groovy annotations that support closures don't get stubs generated correctly
GROOVY-6855: Groovy annotations that support closures don't get stubs generated correctly (fix too eager commit)
Documentation for more operators:
   * fix rendering glitches
   * spread list
   * spread map
   * range
   * spaceship
   * subscript