anchor.diff:      {( () (()) (() (())) )}
         [[],[[]],[[],[[]]]]
     
  +  list can also be keyed
  +    {* (:a 1 :b 2)}
  +      {"a":1,"b":2}
  +
  +  and heterogenous
  +    {* (:a {* (:aa 1 :ab 2)} :b 2 )}
  +      {"a":{"aa":1,"ab":2},"b":2}
  +  
     commands have a handler and a method
       {list count}
         0
  
positive.code: //      [9,9]
  //      
    // THINK: make a different test suite for the dom handler and interactive stuff.
  
  
  
  
  SOME STUFF THAT'S HERE FOR NOW
  
  
  MAGIC PIPE TESTS
  
negative.code:     {22 | add 20}
        42
    
    double underscore takes the previous value
      {21 | add __}
        42
      {21 | add 21 to __}
  