Simplify PackageTest.test_list_local_packages() a bit
Simplify PackageTest.test_list_local_packages() a bit

quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt