RFR: 8336278: Micro-optimize Replace String.format("%n") to System.lineSeparator

[Aleksey Shipilev]

On Thu, 11 Jul 2024 22:45:47 GMT, Shaojin Wen <duke at openjdk.org> wrote:

> There are three places in the JDK code where String.format("%n") is used. This is actually equivalent to System.lineSeparator and does not require the implementation of String.format.

Hah! Yes, it makes no sense to call into `String.format` to just get the line separator.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20149#pullrequestreview-2174110063