anchor.diff:  
   (defmethod libtest ((library-name (eql :cl-cont)))
     ;; The test framework used: rt.
  -  (require-impl "rt-api")
  -  (rt-api:clean)
  +  (clean-rt)
     (asdf:clear-system :cl-cont-test)
     (quicklisp:quickload :cl-cont-test)
     (run-rt-test-suite))
  
positive.code: (defmethod libtest ((library-name (eql :iterate)))
  
    ;; The test framework used: rt.
    (require-impl "rt-api")
    (rt-api:clean)
    (asdf:clear-system :iterate-tests)
    (asdf:clear-system :iterate)
  
  
negative.code: (defmethod libtest ((library-name (eql :trivial-garbage)))
  
    ;; The test framework used: rt.
    (clean-rt)
    (asdf:clear-system :trivial-garbage)  ; yes, trivial-garbage but not trivial-garbage-tests,
                                          ; because the trivial-garbage-tests system is defined
                                          ; in the same trivial-garbage.asd and neither
  