RFR: 8295729: Add jcheck whitespace checking for properties files [v2]

[Andy Goryachev]

On Fri, 21 Oct 2022 08:17:46 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Properties files is essentially source code. It should have the same whitespace checks as all other source code, so we don't get spurious trailing whitespace changes.
>> 
>> With the new Skara jcheck, it is possible to increase the coverage of the whitespace checks (in the old mercurial version, this was more or less impossible).
>> 
>> The only manual change is to `.jcheck/conf`. All other changes were made by running `find . -type f -iname "*.properties" | xargs gsed -i -e 's/[ \t]*$//'`.
>
> Magnus Ihse Bursie has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Remove check for .properties from jcheck
>  - Restore trailing whitespace for property values

368 files to review!  I wish we had separate PRs for fixing properties and checking for trailing whitespace.  i 'd expect it will take some time to review localization, unless we just keep them as is.

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PR: https://git.openjdk.org/jdk/pull/10792