include coverage report in tox -e coverage run

Author: tomato42

tox.ini

@@ -58,7 +58,10 @@ basepython=python3.9
 [testenv:coverage]
 sitepackages=True
 whitelist_externals=coverage
-commands = coverage run --branch -m pytest --hypothesis-show-statistics {posargs:src/ecdsa}
+commands =
+         coverage run --branch -m pytest --hypothesis-show-statistics {posargs:src/ecdsa}
+         coverage xml
+         coverage report -m
 
 [testenv:speed]
 commands = {envpython} speed.py