anchor.diff:   * _w_: select the word and following whitespaces  on the right of selection end
    * _b_: select preceding whitespaces and the word on the left of selection end
    * _e_: select preceding whitespaces and the word on the right of selection end
  + * _alt-[wbe]_: same as [wbe] but select WORD instead of word
   
    * _x_: select line on which selection end lies (or next line when end lies on
           an end-of-line)
  
positive.code:  * _gg_, _gt_: go to the first line
   * _gb_: go to the last line
  
   * _/_: search
   * _n_: find next match
   * _N_: add a new selection with next match
  
  Appending
  ---------
  
  for most selection commands, using shift permits to add to current selection
  instead of replacing it. for example, _wWW_ selects 3 consecutive words
  
  Using Counts
  
negative.code: 
   * _p_: paste after current selection end
   * _P_: paste before current selection begin
   * _alt-p_: replace current selection with yanked text
  
   * _alt-j_: join selected lines
  
   * _>_: indent selected lines
   * _<_: deindent selected lines
  
   * _|_: pipe each selections through the given external filter program
          and replace with it's output.
  
   * _u_: undo last change
   * _U_: redo last change
  
  Multi Selection
  ---------------
  