How can we format cursors and marks in examples? I recently answered How to add a prefix to every line?, which illustrated rectangular sections. To make it clearer, I needed to show where the mark and cursor are when you run a command.
I just did it using
* for the mark and
▮ for the cursor. I'm not entirely happy with it though:
* might be ambiguous, and I'm not sure how well
▮ renders on other people's machines.
So, is there some good typographical convention to use for cursors and marks?