I'm clear on the rules rubocop follows to find the config file or files it uses to build up the list of cops it uses -- it is explained here: RuboCop Configuration
However, the rules allow for several different possibilities, and what I am looking for would be some way to get rubocop to display the path(s) of the file(s) it has found to use.
For example, if I edit a file that I think is the active rubocop config file, but find out when I run rubocop that the change I've made isn't incorporated (ergo rubocop must not be getting its config from there after all, or it's being overridden somewhere else) then it would help to know which file(s) rubocop is in fact getting its config from.
Ideally there would be a command option like rubocop --display_config_paths, which would display the path or paths of all config files it will use as currently invoked -- but given that such an option doesn't exist, is there any way to find this out?