v2 documentation: add a StringSliceFlag example to the manual #1005
Description
What problem does this solve?
This would solve people creating issues about unexpected behavior from the StringSliceFlag, like these ones:
Solution description
Add an example, or maybe multiple examples, of how to input StringSliceFlag
Describe alternatives you've considered
I've considered possibly changing StringSliceFlag to work in the way that both those users were expecting, but that sounds dangerous.