RFR: 8286287: Reading file as UTF-16 causes Error which "shouldn't happen"

[Jaikiran Pai]

On Tue, 10 May 2022 20:22:39 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> `String.decodeWithDecoder()` method requires the `CharsetDecoder` parameter replaces on malformed/unmappable characters with replacements. However, there was a code path that lacked to set the `CodingErrorAction.REPLACE` on the decoder. Unrelated, one typo in a test was also fixed.

Marked as reviewed by jpai (Committer).

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PR: https://git.openjdk.java.net/jdk/pull/8640