Reset sys.path after test

IPython/core/tests/test_completerlib.py

@@ -170,6 +170,9 b' def test_module_without_init():'
     fake_module_name = "foo"
     with TemporaryDirectory() as tmpdir:
         sys.path.insert(0, tmpdir)
+        try:
         os.makedirs(os.path.join(tmpdir, fake_module_name))
         s = try_import(mod=fake_module_name)
         assert s == []
+        finally:
+            sys.path.remove(tmpdir)