Failed saving grub configuration! Ubuntu, with Linux 3.2.0-79-generic

[Galen Thurber]

recently updated desktop kernel
Ubuntu, with Linux 3.2.0-79-generic
and now GC reports error

Failed saving grub configuration!

failed running 'grub-mkconfig -o "/boot/grub/grub.cfg"' output:
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.2.0-79-generic
Found initrd image: /boot/initrd.img-3.2.0-79-generic
Found linux image: /boot/vmlinuz-3.2.0-77-generic
Found initrd image: /boot/initrd.img-3.2.0-77-generic
Found linux image: /boot/vmlinuz-3.2.0-76-generic
Found initrd image: /boot/initrd.img-3.2.0-76-generic
Found memtest86+ image: /boot/memtest86+.bin
Found Sparky (1) on /dev/sda2
error: syntax error.
error: Incorrect command.
error: syntax error.
error: Incorrect command.
error: syntax error.
error: line no: 118
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
done

I have noticed in /etc/default/grub
extra kernel parameters have been added
drm.debug=0xe plymouth:debug
I've removed them and I still get the fatal error

[Galen Thurber (godfree2)]

line 117 of grub.cfg.new

}
function gfxmode {
 set gfxpayload="${1}"
 if [ "${1}" = "keep" ]; then
  set vt_handoff=vt.handoff=7
 else
  set vt_handoff=
 fi
}

 gfxmode $linux_gfx_mode