guide bug?

[Joshua Root]

On 2018-4-28 06:25 , Ryan Schmidt wrote:
> 
> On Apr 27, 2018, at 08:10, Joshua Root wrote:
> 
> 
>> 'move' still handles some case-sensitivity issues, but indeed 'copy' and
>> 'delete' are just aliases these days. I think we don't need to
>> discourage the use of 'file', since if you hit the one fairly rare case
>> where there's a difference you'll know it.
> 
> Not if the bug only affects an OS version you're not using.

What OS version doesn't need the case-only rename code?