RFR: 8138614: (spec str) StringBuffer and StringBuilder methods improperly require "new" String to be returned

[Roger Riggs]

On Wed, 12 Feb 2025 19:55:29 GMT, Stuart Marks <smarks at openjdk.org> wrote:

> A couple adjustments to the specs for four methods of StringBuilder and StringBuffer so that they no longer require new Strings to be created, just a String with the right contents. No implementation changes. Note that the actual specs (and implementations) are actually in AbstractStringBuilder, and they're inherited by StringBuilder and StringBuffer.

Looks good

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Marked as reviewed by rriggs (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23599#pullrequestreview-2615495168