Generate a more compact table

[NyanKiyoshi]

Is your feature request related to a problem? Please describe.
It seems like show is hard to read as it has too many things on it.

Describe the solution you'd like
We could take example on coverage.py

Name                      Stmts   Miss  Cover   Missing
-------------------------------------------------------
my_program.py                20      4    80%   33-35, 39
my_other_module.py           56      6    89%   17-23
-------------------------------------------------------
TOTAL                        76     10    87%

Describe alternatives you've considered
The HTML export, but it doesn't sum things.

Additional context
None.