coverage html: This command should print a line

[guettli]

Is your feature request related to a problem? Please describe.

If you use coverage for the first time in your life, than I think it would be very helpful, if the command coverage html does output a line like:

See output in htmlcov/index.html

If you agree to this proposal, then I could create a pull-request.

What do you think?

[nedbat]

I think this is a good idea. I may do it soon.

[nedbat]

I did it soon :) This is implemented in 4ef91bd

[nedbat]

This is now released as part of coverage 6.0.