Grub customizer won't write config file

[GP]

Please take a look at the command line output below. If you think this is a bug of Grub Customizer, please create one at https://launchpad.net/grub-customizer! Generally Grub Customizer should prevent errors like this.

failed running 'grub-mkconfig -o "/boot/grub/grub.cfg"' output:
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.13.0-24-generic
Found initrd image: /boot/initrd.img-3.13.0-24-generic
Found linux image: /boot/vmlinuz-3.11.0-12-generic
Found initrd image: /boot/initrd.img-3.11.0-12-generic
File descriptor 11 (/proc/19260/mounts) leaked on lvs invocation. Parent PID 21032: /bin/sh
  No volume groups found
Found Windows 7 (loader) on /dev/sda1
Found linux image: /boot/vmlinuz-3.13.0-24-generic
Found initrd image: /boot/initrd.img-3.13.0-24-generic
Found linux image: /boot/vmlinuz-3.11.0-12-generic
Found initrd image: /boot/initrd.img-3.11.0-12-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
error: syntax error.
error: Incorrect command.
error: syntax error.
error: Incorrect command.
error: syntax error.
Syntax error at line 179
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