The next commit will use "echo -e". The problem with that is that bash
and sh differ:

- in bash: this results in "a\nb" (a+newline+b)
- in sh: this results in -e a\nb (-e a+newline+b)

The problem is that by default, commands are executed through sh, which
nobody expects. Change to bash, which is likely more aligned with what
people want to use.