show-marks

* Commentary
This library provides the commands to navigate and display the mark ring.
The `show-marks' command displays a buffer listing the marks in the buffer from which it was called.
You can then press enter on one of the listed marks to jump to it, or press d to delete it from the
mark ring. You can also use the `forward-mark' and `backward-mark' commands to navigate the marks in
the mark ring.