RFR: 8295729: Add jcheck whitespace checking for properties files [v3]

[Naoto Sato]

On Mon, 24 Oct 2022 20:08:02 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> Good idea! I wonder if this should be done as a unit test. go through all the bundles and check leading/trailing whitespace.

Right. Definitely not a job for `jcheck`, but it should be considered somewhere in the l10n process.

-------------

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