Comment 4 for bug 564853

As a comment (from the header in the reproduce script)

# The problem is that the user will be prompted with a dialog:
# What do you want to do about modified configuration file grub?
# even when there is no upstream change to the config file if they
# have made *both*:
# a. changes to grub-pc.postinst fields:
# GRUB_CMDLINE_LINUX, GRUB_CMDLINE_LINUX_DEFAULT, GRUB_TIMEOUT,
# GRUB_HIDDEN_TIMEOUT
# b. any other changes