anchor.diff:                        "~{~a~^ ~}"
                         (mapcar (lambda (string) (printer:pr-str string nil))
                                 strings)))
  -  (types:make-mal-nil nil))
  +  mal-nil)
   
   (defun mal-pr-str (&rest strings)
     (types:make-mal-string (format nil
  
positive.code: (in-package :core)
  
  (defmacro wrap-boolean (form)
    `(if ,form
         types:mal-true
         types:mal-false))
  
  (define-condition index-error (types:mal-error)
    ((size :initarg :size :reader index-error-size)
  
negative.code:                       "~{~a~^ ~}"
                        (mapcar (lambda (string) (printer:pr-str string t))
                                strings)))
    mal-nil)
  
  (defun mal-println (&rest strings)
    ;; Using write-line instead of (format *standard-output* ... ) since the later prints
  