RFR: 8287753: [spelling] close well-established compounds

[Jonathan Gibbons]

On Thu, 2 Jun 2022 22:48:56 GMT, Pavel Rappo <prappo at openjdk.org> wrote:

> This is a spelling and terminology PR, not a code PR. Rationale for some of the changes are as follows:
> 
> * "Subsignature" is mentioned in JLS 8.4.2 Method Signature.
> * lower- and upper- bounded wrt `super` and `extends` are mentioned in JLS 4.10.5 Type Projections.
> * For "super super class" I used a great-grandparent analogy as I'm unaware of any rules on repeated prefixes in English.
> * "subkind" is used on two more occasions a few lines above that change

Marked as reviewed by jjg (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/9007