By providing a .coveragerc file with all default settings, users only
have to execute "coverage run ./runtests.py" without the need to specify
all the possible flags. The same applies to "coverage html" and
"coverage xml".
This only affests reporting not data collection and allows coverage.py
to succesfully finish the generation of e.g. the HTML report.
Cases of code whose execution data is collected during the run phase but
for which no associated source code files can be found at the reporting
phase include tests with egg files and Python module files created at
test execution-time.
