# If the time of an initial backup and the creation time of a file contained
# in that backup are the same, the file will be backed up again when an
# incremental backup is done, because the incremental backup backs up
-# files created `on or after' the initial backup time. Without the sleep
+# files created "on or after" the initial backup time. Without the sleep
# command, behaviour of tar becomes variable, depending whether the system
# clock ticked over to the next second between creating the file and
# backing it up.