Sometimes I want to put some character like ';' at the end of the line I have cursor currently at but just 'A' key doesn't work because the line has a comment at the end or I want to stay at my current's cursor position (and marks are too many buttons to click and fill up the jump list).
So I decided to make a small plugin that allows me to put characters (or any string) at the end of line (but before comments).
Maybe other people can find it useful too.