while you understood the vim functions but you ask what "delete line number means" or yank paste should not be a bug if it is known how it is done. What is sufficient can't be known if you don't use the vim. All the editing function should work. If I were to write a program, I would test everything that I can list as functions and not merely implement the functions and let bug reporters do it. :xd or x,yd that is delete line number :ay or a,by that is yank line number I can't use the plugin now as it is. Bug reporters are not necessarily testers and cannot be assume as testers. They use for production and report the bugs that don't affect their normal usage. If they find the plugins state affects their work then they will not use it or report it. Therefore if you get a bug report you are already fortunate. Would you rather prefer people don't care?