have coverage combine output the processed input files

[altendky]

Is your feature request related to a problem? Please describe.
I just added coverage combining within GitHub Actions for pymodbus and the coverage is lower than I wildly guessed. My first thought was 'am I collecting all the files I meant to?'

Describe the solution you'd like
I thought it would be helpful for coverage combine to output the files it processes via --verbose or some other more specific option.

Describe alternatives you've considered
I first thought about adding an ls -la coverage_reports/ to check the contents of the directory I passed to coverage combine, but that doesn't say what coverage actually combined.

Additional context
n/a

[nedbat]

This seems like a good idea. Somehow, coverage doesn't have any --verbose options yet.

[nedbat]

It occurred to me today that coverage doesn't have --verbose, but it does have --debug. Is there a reason not to use it for this?

[altendky]

It strikes me as more diagnostic logging than debugging but... I'm definitely not going to define the two sufficiently to distinguish them. :] If you feel --debug is the place that fits, I'm game. It looks like people will have to look to the website to find the debug options, as opposed to being available in the CLI?

[nedbat]

I've implemented this in 1f51202. There's no option or control, the command just prints the messages.

[altendky]

Thanks nedbat. :]

[nedbat]

This is now released as part of coverage 6.0.