[Correction] Appendix B & C.8 — fabricated 'not in' / 'is not' compound relational operators

[NickHodges]

Section: Appendix B (Operator Precedence Table), Appendix C.8 (RelOp production)

Current text:
RelOp = ... | 'in' | 'is' | 'not' 'in' | 'is' 'not' ;
(and the corresponding rows in the Appendix B precedence table)

Problem:
Object Pascal has no compound not in or is not operators. Negated membership/type-tests must be written as not (X in Y) and not (X is Y). This is fabricated syntax that would mislead a compiler implementer using this spec, which is the document's stated purpose.

Suggested fix:
Remove not in and is not from both the precedence table and the RelOp EBNF production.

[NickHodges]

Scope correction before fixing: this claim is bigger than the Appendix B/C.8 tables. Chapter 5 has full dedicated subsections — §5.8.1a "The is not Operator (Delphi 13+)" and §5.8.1b "The not in Operator (Delphi 13+)" — presenting these as deliberate Delphi 13 language additions, complete with specific parser disambiguation rules (how not is absorbed into the compound operator only in infix position, etc.). That level of detail reads like a documented design decision, not a copy-paste slip, and a separate review pass that covered that exact text (Chapters 4-7) did not flag it as fabricated.

Given this project verifies exactly this kind of claim against the real Delphi compiler (see the tests/Fixtures lexical fixtures) rather than by assertion, and I don't have a Delphi 13.1 Florence compiler available in this environment, I'm reclassifying this as needs-compiler-verification rather than applying it as a confirmed fix.

To verify: compile if Obj is not TMyClass then ; and if Ch not in ['a'..'z'] then ; against Delphi 13.1 Florence. If both compile, the feature is real and §5.8.1a/§5.8.1b/Appendix B/Appendix C.8 are all consistent as-is (no fix needed here — possibly just cross-reference Chapter 5 from the appendices). If they fail to compile, remove §5.8.1a, §5.8.1b, and the corresponding rows/production alternatives from Appendix B and Appendix C.8's RelOp production.