That is really a derailing of this thread–did you really have to do that?
So back to the ruler plug-in…as I said, I really like it, but I discovered today that when you free the caret so that it can move beyond normal end-of-line (reference https://notepad-plus-plus.org/community/topic/13531/turn-on-cursor-beyond-eol-remove-unnecessary-spaces-when-saving), the plugin doesn’t recognize this and update its visual representation accordingly…pity!