Update formatting in import.c

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: dr-carlos

Python/import.c

@@ -4421,8 +4421,7 @@ _imp_create_builtin(PyObject *module, PyObject *spec)
     }
 
     if (PyUnicode_GetLength(name) == 0) {
-        PyErr_Format(PyExc_ValueError,
-                     "name must not be empty");
+        PyErr_Format(PyExc_ValueError, "name must not be empty");
         Py_DECREF(name);
         return NULL;
     }