anchor.diff:        input.form-control(
           id=pgmpid
           name="page"
  -        size='8'
           type='number'
           min='1',
           max=max
  -        value = current
  +        value=current
           placeholder=self.t('dropdown_placeholder')
         )
         span.input-group-btn
  
positive.code:       - delete(params.page)
        a.pgn__link.dropdown-toggle(
          href=self.link_to(route, params)
          data-target="#", data-toggle='dropdown'
        ) ...
        mixin _pagination_dropdown_menu(route, params)
  
  
negative.code:     li.pgn__item.interval.dropdown
        - delete(params.page)
        a.pgn__link.dropdown-toggle(
          href=self.link_to(route, params)
          data-target="#"
          data-toggle='dropdown') ...
        mixin _pagination_dropdown_menu(route, params)
  
    //- last page always displayed, except it's current one
  