Nice! I found a screenshot:
As you can see, it's very flexible. I can have a static prefix and/or suffix. I can set what number it should start at, and also the step increments. The "repeat" option mya not apply in this case. That setting is for you to indicate how many times this cycle should be repeated, but in the case of text lists, you probably always want it going until it reaches the end of the list.
What's really great about the tool above is that I can even enter a letter like "a" in the starting box and it will increment the list using letters instead of numbers (a..b..c..d...etc). It would be nice to have the option to do numbers, letters, or a custom mix of both. Sometimes I want outline numbering:
Sometimes you want a mix:
But with the dialog above, all that can be taken care of. In the example above, I would put "A-" in the prefix and that would work. In the outline example, I'd put "1.1." in the prefix. And so forth.