RFR: 8356107: [java.lang] Use @requires tag instead of exiting based on os.name or separatorChar property

[Brian Burkhalter]

On Fri, 9 May 2025 23:23:27 GMT, Brent Christian <bchristi at openjdk.org> wrote:

> For `java.lang` tests, use the `@requires` facility in place of checking the `os.name` system property or `File.separatorChar`.
> 
> Automated test results are omitted as expected.

test/jdk/java/lang/RuntimeTests/exec/Space.java line 42:

> 40:                 throw new RuntimeException("Extra space in command.");
> 41:         } catch (IOException e) {
> 42:             // not Win NT - cmd doesnt exist

As long as you're there: `doesnt` -> `doesn't`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25163#discussion_r2082640179