anchor.diff:  	   :escape
   	   :$
   	   :br
  +           :\\
   	   :[]
   	   :{}
   	   :tex
  
positive.code: (defun compile-break ()
    "Print double newline."
    `(format t "~%~%"))
  
  (defun compile-parenthesized (open close expressions)
    "Compile EXPRESSIONS parenthesized by OPEN and CLOSE."
  
negative.code: (defparameter $ nil
    "Special form symbol for interpolation.")
  
  (defparameter br nil
    "Special form symbol for printing paragraph seperators (double
    newline).")
  
  (defparameter \\ nil
    "Special form symbol for printing explicit newline tokens.")
  
  (defparameter [] nil
    "Special form symbol for wrapping expressions with brackets.")
  