Fixed some linting issues

Author: hategan

tests/_test_tools.py

@@ -28,7 +28,7 @@ def _read_file(path: Optional[Path]) -> str:
         return f.read()
 
 
-def assert_completed(job: Job, status: Optional[JobStatus], attached=False) -> None:
+def assert_completed(job: Job, status: Optional[JobStatus], attached: bool = False) -> None:
     assert status is not None
     if status.state != JobState.COMPLETED:
         if not attached:
@@ -42,6 +42,7 @@ def assert_completed(job: Job, status: Optional[JobStatus], attached=False) -> N
             raise AssertionError('Job not completed. Exit code: %s, Status message: %s'
                                  % (status.exit_code, status.message))
 
+
 def _get_executor_instance(ep: ExecutorTestParams, job: Optional[Job] = None) -> JobExecutor:
     if job is not None:
         assert job.spec is not None

tests/user_guide/test_prelaunch.py

@@ -2,7 +2,7 @@
 from pathlib import Path
 
 from _test_tools import assert_completed
-from psij import Job, JobSpec, JobExecutor, JobState
+from psij import Job, JobSpec, JobExecutor
 
 
 def test_user_guide_pre_launch() -> None: