jtreg test comments: /* vs /** usage

[Daisuke Yamazaki]

Hello all,

I noticed that in most jtreg tests, the standard block comment `/* ... */` is 
used for the test directives.
This is also what official jtreg documentation shows.

However, in some older tests[1], for example QUIC-related tests[2], 
I see`/** ... */` being used instead of `/* ... */`.

Is there any specific reason for using JavaDoc-style comments (`/** ... */`) in 
these tests?
Are there cases where `/**` beginning is preferred over the regular block 
comment for jtreg directives?

If there is a need to standardise this style, I can file a bug to track it.

Thanks for any clarification.

Best regards,
D. Yamazaki

[1]: https://github.com/openjdk/jdk/blob/master/test/jdk/java/net/httpclient/Http1ChunkedTest.java#L40-L46
[2]: https://github.com/openjdk/jdk/blob/master/test/jdk/java/net/httpclient/quic/AckElicitingTest.java#L86-L93