[code-reflection] RFR: Document quoteOp and quotedOp methods [v4]

[Mourad Abbay]

> Specify the behaviour of quoteOp and quotedOp methods.

Mourad Abbay has updated the pull request incrementally with three additional commits since the last revision:

 - Update comment
 - Comment on the validation of block params and ConstantOp results
 - Document Quoted.quotedOp

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Changes:
  - all: https://git.openjdk.org/babylon/pull/512/files
  - new: https://git.openjdk.org/babylon/pull/512/files/659f018f..e75f36f9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=512&range=03
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=512&range=02-03

  Stats: 29 lines in 1 file changed: 21 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/babylon/pull/512.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/512/head:pull/512

PR: https://git.openjdk.org/babylon/pull/512