Fix Python lint failure in test_host_specific_configuration

Author: shahmishal

utils/swift_build_support/tests/test_host_specific_configuration.py

@@ -596,7 +596,8 @@ def test_should_test_optimizations_with_subsets(self):
                       before.swift_test_run_targets)
         self.assertIn(target_name.format('optimize_size'),
                       before.swift_test_run_targets)
-        self.assertIn(target_name.format('optimize_none_with_implicit_dynamic'),
+        self.assertIn(target_name.format(
+                      'optimize_none_with_implicit_dynamic'),
                       before.swift_test_run_targets)
 
     def default_args(self):