Rename "I" to "line_prefix" to avoid flake8 E741
Rename "I" to "line_prefix" to avoid flake8 E741

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

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