fix test

(behaviour of run is like subprocess.run)

tests.py

@@ -36,7 +36,7 @@ def test_run_method(tmp_path):
         # ensure single string command works
         assert run(("ls -l"), shell=True).returncode == 0
         # test spaces are handled correctly:
-        assert run(["touch", "file1 file2"]).returncode == 0
+        assert run(["touch", "file1", "file2"]).returncode == 0
         assert os.path.exists("file1")
         assert os.path.exists("file2")
         # test output is captured: