[code-reflection] RFR: Adding String Concatenation to Code Model [v3]

[Ian Graves]

> Adding String concatenation to the code model and interpreter.

Ian Graves has updated the pull request incrementally with one additional commit since the last revision:

  Removing unused var

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

Changes:
  - all: https://git.openjdk.org/babylon/pull/47/files
  - new: https://git.openjdk.org/babylon/pull/47/files/d401f54a..77283ab7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=47&range=02
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=47&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/47.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/47/head:pull/47

PR: https://git.openjdk.org/babylon/pull/47