* Dridi Boukelmoune:
This is the kind of spec that leads to spoiled upstreams putting
/bin/sh in shebangs and scratching their heads when they get bug
reports for stricter systems...
I'd be happier if Fedora was not part of the problem and maintainers
were encouraged to figure out the correct shebang (and when in doubt
use /usr/bin/bash).
If you want more compatibility, you definitely can't use /usr/bin/bash.
Fedora is so different from other GNU/Linux systems these days, so I'm
not sure if *any* recommendation to encourage portability (at the cost
of convenience to Fedora developers or users) makes sense anymore.