code: def load_auto_suggestion_bindings():
      
      registry = Registry()
      handle = registry.add_binding
  
      suggestion_available = Condition(
          lambda cli:
              cli.current_buffer.suggestion is not None and
              cli.current_buffer.document.is_cursor_at_the_end)
  
      @handle(Keys.ControlF, filter=suggestion_available)
      @handle(Keys.ControlE, filter=suggestion_available)
      @handle(Keys.Right, filter=suggestion_available)
      def _(event):
          " Accept suggestion. "
          b = event.current_buffer
          suggestion = b.suggestion
  
          if suggestion:
              b.insert_text(suggestion.text)
  
      return registry
docs: Key bindings for accepting auto suggestion text.