anchor.diff:  
   for example, _3W_ selects 3 consecutive words and _3w_ select the third word on
   the right of selection end.
  -
  - * _space_: when used with count, keep only the counth selection
  - * _alt-space_: when used with count, remove the counth selection
   
   Changes
   -------
  
positive.code: Basic Movement
  --------------
  
   * _space_: select the character under last selection end
   * _alt-space_: flip the selections direction
  
   * _h_: select the character on the right of selection end
   * _j_: select the character below the selection end
   * _k_: select the character above the selection end
  
negative.code: line boundaries.
  
  To clear multiple selections, use _space_. To keep only the nth selection
  use _n_ followed by _space_, in order to remove a selection, use _alt-space_.
  
  _alt-k_ allows you to enter a regex and keep only the selections that
  contains a match for this regex. using _alt-K_ you can keep the selections
  