Handle FAT filesystem with fsimage comparator

class FsImageFile(File):

    DESCRIPTION = "ext2/ext3/ext4/btrfs filesystems"

    DESCRIPTION = "ext2/ext3/ext4/btrfs/fat filesystems"

    CONTAINER_CLASS = FsImageContainer

    FILE_TYPE_RE = re.compile(r'^(Linux.*filesystem data|BTRFS Filesystem).*')

    @classmethod

    def recognizes(cls, file):

        # Avoid DOS / MBR file type as it generate a lot of false possitives,

        # manually check "System identifier string" instead

        with open(file.path, 'rb') as f:

            f.seek(54)

            if f.read(8) in (b'FAT12   ', b'FAT16   '):

                return True

            f.seek(82)

            if f.read(8) == b'FAT32   ':

                return True

        return super().recognizes(file)

    def compare_details(self, other, source=None):

        differences = []

        my_fs = ''