anchor.diff:     thing."
   
   (import base (defun defmacro when unless let* set-idx!
  -              get-idx for gensym -or slice /=
  +              get-idx for gensym -or slice /= %
                 pretty print error tostring  -and
                 unpack debug if n + - >= > = ! with
  -              apply and progn .. * while <=))
  +              apply and progn .. * while <= < or))
   (import base)
   (import lua/table)
   (import type (nil? list? empty? assert-type! exists? falsey? eq? neq? type))
  -(import lua/math (min max))
  +(import lua/math (min max huge))
   
   (defun car (x)
     "Return the first element present in the list X. This function operates
  
positive.code: 
     ### Example:
     ```cl
     > (nth (range 1 100) 10)
     out = 10
     ```"
    (if (>= idx 0)
  
negative.code:                   (if (even? x)
                      nil
                      (succ x)))
                  (range :from 1 :to 10))
     out = (2 4 6 8 10)
     ```"
    (let* [(lengths (let* [(out '())]
  