Withdrawn: 8323760: clarify specification of Map::putIfAbsent return value

[duke]

On Tue, 16 Jan 2024 07:40:44 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> Update the documentation for `@return` tag of `putIfAbsent` to match the main description. `putIfAbsent` uses the same wording as `put` for its `@return` tag, but that is incorrect.  `putIfAbsent` never returns the **previous** value, as the whole point of the method is not the replace the value if it was present.  As such, if it returns a value, it is the **current** value, and in all other cases it will return `null`.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/17438