LinuxAdmin::Disk.create_partition causes parted to exit with a 1

[twiest]

I get an error when I try to create a partition like this:

irb> require 'linux_admin'
=> true

irb> disk = LinuxAdmin::Disk.new(:path => '/dev/xvdp')
=> #<LinuxAdmin::Disk:0x00000001f64108 @path="/dev/xvdp">

irb> disk.create_partition('primary', 1024)
CommandResultError: /sbin/parted exit code: 1
    from /opt/rh/ruby193/root/usr/share/gems/gems/linux_admin-0.7.0/lib/linux_admin/common.rb:41:in `run!'
    from /opt/rh/ruby193/root/usr/share/gems/gems/linux_admin-0.7.0/lib/linux_admin/disk.rb:156:in `create_partition'
    from (irb):3
    from /opt/rh/ruby193/root/usr/bin/irb:12:in `<main>'

irb>

I've tracked this down to this line in disk.rb:
options = parted_options_array('mkpart', '-a opt', partition_type, start, finish)

It should be:
options = parted_options_array('mkpart', '-a', 'opt', partition_type, start, finish)

'-a opt' all together makes the parted command look like this (the slash is the problem):
/sbin/parted --script /dev/xvdp mkpart -a\ opt primary 0 1024