RFR: 8358530: Properties#list should warn against non-String values [v3]

[Chen Liang]

On Thu, 17 Jul 2025 15:32:32 GMT, cagliostro92 <duke at openjdk.org> wrote:

>> Trivial PR to enhance Javadoc for the `Properties#list` method, which has cost me some debugging time.
>
> cagliostro92 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8358530: adds oxford comma

Marked as reviewed by liach (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/25334#pullrequestreview-3030375304