Shebang lines for Python on Windows

Interesting. I never used py.exe. That can be handy, but it would not have helped in my case. We were using Python in our CI and the assumption was: since we start the script from Git Bash, the shebang is going to work properly, because Bash knows about shebangs. And indeed it does, but we still could not write "#!/usr/bin/env python3" because there was no python3.exe file (until we created one by copying python.exe to python3.exe, meh).

I still believe being able to reliably depend on the availability of a python3 binary on all supported platforms would have helped a lot.