[code-reflection] RFR: Make Quotable a marker interface [v5]

[Mourad Abbay]

> In this PR, we make Quotable a marker interface. This PR is based on #301.

Mourad Abbay has updated the pull request incrementally with one additional commit since the last revision:

  Fix merge

-------------

Changes:
  - all: https://git.openjdk.org/babylon/pull/302/files
  - new: https://git.openjdk.org/babylon/pull/302/files/f5b541b4..487d2f57

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=302&range=04
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=302&range=03-04

  Stats: 3 lines in 1 file changed: 0 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/302.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/302/head:pull/302

PR: https://git.openjdk.org/babylon/pull/302