unable to pass SALSA_CI_PIUPARTS_ARGS with a space

While trying to make a workaround for #123 (closed) I tried to pass the parameter --extra-repo via SALSA_CI_PIUPARTS_ARGS.

I was not able to find a way how to pass the parameter because it has some spaces. I tried a few one:
phpmyadmin-team/phpmyadmin@766c576e
phpmyadmin-team/phpmyadmin@bc853f8e
phpmyadmin-team/phpmyadmin@1db52bb7
phpmyadmin-team/phpmyadmin@503e5624
phpmyadmin-team/phpmyadmin@03f44469

As a result I needed to overwrite the whole piuparts job like in phpmyadmin-team/phpmyadmin@416f1dc9