test: Use number-optional-number variant of kernelUnitLength
test: Use number-optional-number variant of kernelUnitLength

Signed-off-by: Niels Thykier <a802a5730c0da02a06106670cc12c7838c6e90dc@thykier.net>

Ede123/scour,oberstet/scour,codedread/scour,scour-project/scour