anchor.diff:  After this key, you need to enter a second key in order to specify which
   object you want.
   
  - * +b+, _(_ or _)_: select the enclosing parenthesis
  - * +B+, _{_ or _}_: select the enclosing {} block
  - * +r+, _[_ or _]_: select the enclosing [] block
  - * +a+, _<_ or _>_: select the enclosing <> block
  + * +b+, +(+ or +)+: select the enclosing parenthesis
  + * +B+, +{+ or +}+: select the enclosing {} block
  + * +r+, +[+ or +]+: select the enclosing [] block
  + * +a+, +<+ or +>+: select the enclosing <> block
    * +"+: select the enclosing double quoted string
    * +'+: select the enclosing single quoted string
    * +`+: select the enclosing grave quoted string
  
positive.code: Most selection commands also support counts, which are entered before the
  command itself.
  
  for example, _3W_ selects 3 consecutive words and _3w_ select the third word on
  the right of selection end.
  
  Changes
  
negative.code: ---------
  
  for most selection commands, using shift permits to extend current selection
  instead of replacing it. for example, +wWW+ selects 3 consecutive words
  
  Using Counts
  ------------
  