RFR: 8299080: Wrong default value of snippet lang attribute

[Jonathan Gibbons]

On Tue, 9 Jul 2024 19:50:42 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

>>> I think Chen's point was that it should not be `null`, to which I agree, although it is probably a corner case.
>> 
>> If so, my bad for misreading it. For such corner cases authors should specify `lang` attribute.
>
> General comment: while the dust on `Path.getExtension` is still settling, as a matter of policy, we should try and stay compatible with that. In particular, a filename like `.gitignore` is a hidden filename with no extension, not an empty filename with a 9-letter extension.

Agreed on lower case

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PR Review Comment: https://git.openjdk.org/jdk/pull/19971#discussion_r1671247682