8293280: [lworld] IdentityHashmap spec when key is a Value class

[RogerRiggs]

In the IdentityHashMap class javadoc elaborate the meaning and use of == sameness meaning indistinguishable.

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• JDK-8293280: [lworld] IdentityHashmap spec when key is a Value class (Bug - P3)

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• 00: Full (82e266ae)

[RogerRiggs]

@dansmithcode Please review, Is there more to say here? tnx

[liach]

HTML render has no special treatment of backtick chars. Only markdown converts them to code blocks. See the current rendering at https://download.java.net/java/early_access/valhalla/27/docs/api/java.base/java/util/IdentityHashMap.html