anchor.diff:     ** `-debug`: print the given text to the `\*debug*` buffer
    * `nop`: does nothing, but as with every other commands, arguments may be
        evaluated. So nop can be used for example to execute a shell command
  -     while being sure that it's output will not be interpreted by kak.
  +     while being sure that its output will not be interpreted by kak.
        `:%sh{ echo echo tchou }` will echo tchou in Kakoune, whereas
        `:nop %sh{ echo echo tchou }` will not, but both will execute the
        shell command.
  
positive.code:             tabstop option or the count parameter for tabstop.
  
   * `<a-)>`: rotate selections content, if specified, the count groups
              selections, so `3<a-)>` rotate (1, 2, 3) and (3, 4, 6)
              independently.
   * `<a-(>`: rotate selections content backwards
  
  
negative.code:         indent (3 leading spaces when indent is 4)
  
   * `|`: pipe each selection through the given external filter program
          and replace the selection with its output.
   * `<a-|>`: pipe each selection through the given external filter program
          and ignore its output
  
  