GROOVY-6139: Fix undesirable system.out debug output (introduced with 6139)
GROOVY-7200: Groovysh: Completion for instanceof statements
This commit breaks the API of GroovySyntaxCompletor class

New feature:
groovy:000> x instanceof Gr|<tab>
Now completes
GregorianCalendar  Grab  GrabConfig  GrabExclude ...
GROOVY-7201: Groovysh: Fix Annotations before member methods causing parse error output