anchor.diff:  the command behaviour.
   
   For example, *3W* selects 3 consecutive words and *3w* select the third word on
  -the right of selection end.
  +the right of the end of each selection.
   
   == Disabling Hooks
   
  
positive.code:     yank selections
  
  *p*::
      paste after current selection end
  
  *P*::
      paste before current selection begin
  
  *<a-p>*::
      paste all after current selection end, and select each pasted string
  
  *<a-P>*::
      paste all before current selection begin, and select each pasted string
  
  *R*::
      replace current selection with yanked text
  
  *<a-R>*::
      replace current selection with every yanked text
  
  *r*::
      replace each character with the next entered one
  
negative.code: == Changes
  
  *i*::
      enter insert mode before selections
  
  *a*::
      enter insert mode after selections
  
  *d*::
      yank and delete selections
  
  *c*::
      yank and delete selections and enter insert mode
  
  *.*::
      repeat last insert mode change (*i*, *a*, or *c*, including the
      inserted text)
  
  *<a-d>*::
      delete selections (not yanking)
  
  *<a-c>*::
      delete selections and enter insert mode (not yanking)
  
  *I*::
      enter insert mode at the beginning of the lines containing
      the start of each selection
  
  *A*::
      enter insert mode at the end of the lines containing
      the end of each selection
  
  *o*::
      enter insert mode in a new line (or in a given count of new lines)
      below the end of each selection
  
  *O*::
      enter insert mode in a new line (or in a given count of new lines)
      above the beginning of each selection
  
  *<a-o>*::
      add an empty line below cursor
  