The python scripts invoked by 'make check' didn't work on python3
before. That was a problem on systems where 'python' is python3.
Fixes bug 11608; bugfix on 0.2.5.2-alpha.
If openssl was old, Tor would add a warning about its version in
between saying "no torrc found, using reasonable defaults" and
"configuration was valid".
I was using the assertIn() function on unit tests, which Python 2.7
introduced. But we'd like to be able to run our unit tests on Pythons
from older operating systems.
