Route test_py3_str_slicing

tests_python/test_safe_repr.py:None–None

pytest.mark.parametrize(
    "params",
    [
        {"maxother_outer": 20, "input": "😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄😄FFFFFFFF", "output": "😄😄😄😄😄😄😄😄😄😄😄😄😄...FFFFFF"},
        {"maxother_outer": 10, "input": "😄😄😄😄😄😄😄

# coding: utf-8
import collections
import sys
import re