[3.13] gh-111997: Fix argument count for LINE event and clarify type of argument counts. (GH-119179) (GH-119575)

gh-111997: Fix argument count for LINE event and clarify type of argument counts. (GH-119179)
(cherry picked from commit 70b07aa4153c1a914a3d69307d5b258cf7ed16ab)

Co-authored-by: scoder <stefan_ml@behnel.de>