RFR: 7057369: (fs spec) FileStore getUsableSpace and getUnallocatedSpace could be clearer [v2]

[Alan Bateman]

On Fri, 5 Jan 2024 16:33:35 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

>> Attempt to clarify when the values returned for a `FileStore`s usable and unallocated space are initialized and likely to be valid.
>
> Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address reviewer comments

Marked as reviewed by alanb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17271#pullrequestreview-1806592578