anchor.diff:  
   To clear multiple selections, use _space_. To keep only the nth selection
   use _n_ followed by _space_.
  +
  +Object Selection
  +----------------
  +
  +Using alt-i and alt-a, you can select some text object, the starting
  +point is always the last character of the selection.
  +
  +* _b_, _(_ or _)_: select the enclosing parenthesis
  +* _B_, _{_ or _}_: select the enclosing {} block
  +* _[_ or _]_: select the enclosing [] block
  +* _<_ or _>_: select the enclosing <> block
  +* w: select the whole word
  +* W: select the whole WORD
  +
  +When it makes sense, alt-i selects the inner object and alt-a the whole
  +object. For example alt-i ( will only select the inside of the parenthesis.
   
   Registers
   ---------
  
positive.code: 
  for example, _3W_ selects 3 consecutive words and _3w_ select the third word on
  the right of selection end.
  
  Changes
  -------
  
negative.code: 
   * _%_: select whole buffer
  
   * _gh_, _alt-H_: select to line begin
   * _gl_, _alt-L_: select to line end
  
   * _gg_, _gt_: go to the first line
   * _gb_: go to the last line
  
  Appending
  ---------
  