RFR: Filing bug, ProblemListing, Backing out [v6]

[Alan Bateman]

On Fri, 10 Jul 2020 00:38:41 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

>> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Put back Verify step in backout description.
>
> still LGTM

Filing a Bug - are you going to say anything about checking if the issue exists in the main line, esp. with
reproducible issues? Also what about advice on attaching a reproducer if possible?

"ProblemListing or `@ignore`-ing a Test".  The ProblemList.txt files are jtreg exclude list. Can this section be
renamed to "How to exclude tests"?  I don't think we've used "@ignore" for long time and might it simpler to just not
mention it.

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PR: https://git.openjdk.java.net/guide/pull/21