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.
No, I'm asking what _you_ mean by "delete line number" because you didn't explain it and "delete line number" is a bad description. What you want is not deleting a line number - you want deleting a line at certain line number. And if someone gives such vague descriptions, I just need to make sure that I understand what the person wants (and yes, I understood it correctly, you just didn't care to answer my question here https://github.com/geany/geany-plugins/issues/1060#issuecomment-898895363).
And you confuse me with @elextr - I didn't ask about the yank problem at all, the description was quite clear.
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.
And what do you think I did? You think I didn't test it at all? I did all my best to test all I could but there are already something like 100 vim functions to test and lots of their combinations and corner cases (for instance, the yank problem only affects end of files and when you have Geany set up so that it inserts EOL at the end of file, you won't see that problem).
If I were to write a program...
Yes, that's the problem - you didn't spend any time writing the plugin, you just came here blaming the author who spent lots of hours writing the plugin in his spare time how lousy job he did and how you would do a much better job. To that, I can only give you one answer: show me (by looking at your profile, I can't see any projects you contributed to or any code you have written).
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?
I absolutely want people to report bugs. Bug reports should describe what doesn't work correctly and what's missing and be technical and not contain the additional garbage you added. The only two useful things I got from you is the yank problem and missing `:d` which will probably be fixed in something like 10 lines of code. If that's all that's the reason why you "can't use the plugin", nice. But if there are more reasons, I'm just not a magician and can't read your thoughts so these things won't get fixed unless you describe them properly.