Method reset_shell

Lib/idlelib/idle_test/test_sidebar.py:434–437

(cls)

    @classmethod
    def reset_shell(cls):
        cls.shell.per.bottom.delete(f'{cls.n_preface_lines+1}.0', 'end-1c')
        cls.shell.shell_sidebar.update_sidebar()
        cls.root.update()

    def setUp(self):
        # In some test environments, e.g. Azure Pipelines (as of