Added a note to the description.

But description clearly says what to do when some value is out of 0-255 range.

Any values that fall out of that range must be rounded to the closest valid value.

There is no issue.

Actual is what your function returned, and it's wrong, the test says which input was used: "This sentence is a sentence", the expected value is ok, debug your code.

The tests are ok, your code is wrong. Not a kata issue.

kata hint != kata suggestion ~~