Fixed missing ) on assert in the sample import script.
Fixed missing ) on assert in the sample import script.

woodymit/millstone_accidental_source,woodymit/millstone_accidental_source,churchlab/millstone,woodymit/millstone,churchlab/millstone,woodymit/millstone,churchlab/millstone,woodymit/millstone_accidental_source,woodymit/millstone,churchlab/millstone,woodymit/millstone_accidental_source,woodymit/millstone