fix test issue

[sdpython]

FAILED _unittests/ut_helpers/test_cache_helper.py::TestCacheHelpers::test_make_sliding_window_cache - AssertionError: expected is 'SlidingWindowCache(key_cache=#3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7], value_cache=#3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7])', value is 'StaticCache(key_cache=#3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7], value_cache=#3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7])'
'SlidingWindowCache(key_cache=#3[T1s4x5x6x7[70 chars]x7])' != 'StaticCache(key_cache=#3[T1s4x5x6x7,T1s4x5[63 chars]x7])'

• SlidingWindowCache(key_cache=Add patches #3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7], value_cache=Add patches #3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7])
  ? ^ ^^^^^^^^^^

• StaticCache(key_cache=Add patches #3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7], value_cache=Add patches #3[T1s4x5x6x7,T1s4x5x6x7,T1s4x5x6x7])
  ? ^^^ ^