test_grrrrit_log_file: Rename l to diffline to avoid whining from tox
test_grrrrit_log_file: Rename l to diffline to avoid whining from tox

Change-Id: I52a63e3a7693db169c4ee25e6fbacff758637075
Reviewed-on: https://gerrit.wikimedia.org/r/599465
Reviewed-by: Jforrester <b791c45d58a8d7ac4c8c7cfa93aaa0defc9c1ffd@wikimedia.org>
Tested-by: jenkins-bot

wikimedia/labs-tools-wikibugs2,wikimedia/labs-tools-wikibugs2