* fix: sed invocations to work out of the box on macOS
These fixes make the sed invocations run on macOS but I am not sure if they will break the GNU sed invocations in return…
* fix: add macOS branches to the shell scripts
The sed command line was difficult (impossible?) to be made portable so I just added macOS conditions.
* Prototype the solution using an alias
It seems that this will not work because I keep getting "sedi: command not found".
* fix: use a Bash function instead of an alias to run sed portably
This seems to work on my local so let's see if it runs in the CI on GitHub.
* fix: use 2 spaces like the original scripts did
Not sure why VS Code went with 4.
* fix: use sedi for the build-changelog `1i\` part as well
I am curious if Ubuntu will handle the newline…
