Show all commits since version 'v2.6.12' that changed any file
in the include/scsi or drivers/scsi subdirectories
-`git log --since="2 weeks ago" \-- gitk`::
+`git log --since="2 weeks ago" -- gitk`::
Show the changes during the last two weeks to the file 'gitk'.
The "--" is necessary to avoid confusion with the *branch* named