Comment 0 for bug 1531474

On a new install of wily. update-grub is improperly inserting a carriage return on the "linux" line of the grub.cfg menu items, between the two devices of a btrfs raid1 system (which for my system is in a luks container). The menu entries all looks like this:

menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-/dev/mapper/luks.root1_/dev/mapper/luks.root2' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod btrfs
        set root='hd2,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos1 --hint-efi=hd2,msdos1 --hint-baremetal=ahci2,msdos1 fe74974e-3e23-43af-bfb1-7b520673c52b
        else
          search --no-floppy --fs-uuid --set=root <UUID>
        fi
        linux /@s3970boot/vmlinuz-4.2.0-23-generic root=/dev/mapper/luks.root1
/dev/mapper/luks.root2 ro rootflags=subvol=@ quiet splash $vt_handoff
        initrd /@s3970boot/initrd.img-4.2.0-23-generic
}

Removing that <cr> makes everything boot fine.