anchor.diff:  
   
   ;;; The following functions are analogous to MAPC/MAPCAR/MAPCAN
  -;;; and MAPL/MAPLIST/MAPCON, but for alists and plists.
  +;;; and MAPL/MAPLIST/MAPCON, but for alists, plists and vectors.
  +;;;
  +;;; Also, with slightly different semantics,
  +;;; the MAPT* family of functions for mapping over integers.
   ;;;
   ;;; ┌───┬────────────────────────────┬────────┬───────────┬──────────┐
  -;;; │PKG│         Result acc. method │ nil    │ list      │ nconc    │
  +;;; │PKG│ Result accumulation method │ nil    │ list      │ nconc    │
   ;;; ├───┼────────────────────────────┼────────┼───────────┼──────────┤
  -;;; │   │      Structure mapped over │        │           │          │
  -;;; │   │                            │        │           │          │
  +;;; │   │         Values mapped over │        │           │          │
  +;;; │   ├----------------------------┤        │           │          │
   ;;; │CL │         elements of a list │ MAPC   │ MAPCAR    │ MAPCAN   │
   ;;; │CL │           conses of a list │ MAPL   │ MAPLIST   │ MAPCON   │
   ;;; │   │                            │        │           │          │
   ;;; │LL │ (key . value)s of an alist │ MAPAL  │ MAPALIST  │ MAPACON  │
   ;;; │LL │   (key value)s of an alist │ MAPAL* │ MAPALIST* │ MAPACON* │
   ;;; │LL │    (key value)s of a plist │ MAPPL  │ MAPPLIST  │ MAPPCON  │
  +;;; │LL │       elements of a vector │ MAPV   │ MAPVECTOR │ MAPVCON  │
  +;;; │   │                            │        │           │          │
  +;;; │LL │  integers from 0 below max │ MAPT   │ MAPTIMES  │ MAPTCON  │
  +;;; │LL │  As above, but no iter var │ MAPT*  │ MAPTIMES* │ MAPTCON* │
   ;;; └───┴────────────────────────────┴────────┴───────────┴──────────┘
   ;;;
   ;;; Note that the names of the new functions
  
positive.code: 
  Calling this function NCOLLECT has at least two advantages:
  1. The N prefix reminds you that you must pass a fresh list
  that isn't referenced anywhere else because of the destructive behavior
  \(its tail will be modified the next time COLLECT or NCOLLECT is called).
  2. NCOllect starts the same as NCOnc.
  Other candidates would have been COLLECT-LIST (a bit long)
  
negative.code: 	   #:mappl
  	   #:mapplist
  	   #:mappcon
  	   #:mapv
  	   #:mapvector
  	   #:mapvcon
  	   #:mapt
  	   #:maptimes
  	   #:maptcon
  	   #:mapt*
  	   #:maptimes*
  	   #:maptcon*
  
  	   #:for*
  	   #:step*
  