Property test failure - tokenizing literal unicode characters

[bpringe]

https://app.circleci.com/pipelines/github/BetterThanTomorrow/calva/5349/workflows/35d49d95-ef97-4df6-bb65-cd00a5d3ec17/jobs/23905

  1) Scanner
       simple
         tokenizes literal characters
           tokenizes literal unicode characters:
     Property failed after 83 tests
{ seed: 2143097431, path: "82:13", endOnFailure: true }
Counterexample: ["\\
"]
Shrunk 1 time(s)
Got error: Error: expect(received).toBe(expected) // Object.is equality
Expected: "\
"
Received: "\"
Stack trace: Error: expect(received).toBe(expected) // Object.is equality
Expected: "\
"
Received: "\"
at /home/circleci/calva/src/extension-test/unit/cursor-doc/clojure-lexer-test.ts:331:35
at Property.predicate (/home/circleci/calva/node_modules/fast-check/lib/check/property/Property.generated.js:16:105)
at Property.run (/home/circleci/calva/node_modules/fast-check/lib/check/property/Property.generic.js:20:31)
at runIt (/home/circleci/calva/node_modules/fast-check/lib/check/runner/Runner.js:21:32)
at check (/home/circleci/calva/node_modules/fast-check/lib/check/runner/Runner.js:113:11)
at Object.assert (/home/circleci/calva/node_modules/fast-check/lib/check/runner/Runner.js:117:15)
at Context. (/home/circleci/calva/src/extension-test/unit/cursor-doc/clojure-lexer-test.ts:327:12)
at callFn (/home/circleci/calva/node_modules/mocha/lib/runnable.js:366:21)
at Test.Runnable.run (/home/circleci/calva/node_modules/mocha/lib/runnable.js:354:5)
at Runner.runTest (/home/circleci/calva/node_modules/mocha/lib/runner.js:678:10)
at /home/circleci/calva/node_modules/mocha/lib/runner.js:801:12
at next (/home/circleci/calva/node_modules/mocha/lib/runner.js:593:14)
at /home/circleci/calva/node_modules/mocha/lib/runner.js:603:7
at next (/home/circleci/calva/node_modules/mocha/lib/runner.js:486:14)
at Immediate._onImmediate (/home/circleci/calva/node_modules/mocha/lib/runner.js:571:5)
at processImmediate (node:internal/timers:464:21)
Hint: Enable verbose mode in order to have the list of all failing values encountered during the run
Error: Property failed after 83 tests
{ seed: 2143097431, path: "82:13", endOnFailure: true }
Counterexample: ["\
  "]
Shrunk 1 time(s)
Got error: Error: expect(received).toBe(expected) // Object.is equality
Expected: "\
  "
Received: "\"
Stack trace: Error: expect(received).toBe(expected) // Object.is equality
Expected: "\
  "
Received: "\"
at /home/circleci/calva/src/extension-test/unit/cursor-doc/clojure-lexer-test.ts:331:35
at Property.predicate (node_modules/fast-check/lib/check/property/Property.generated.js:16:105)
at Property.run (node_modules/fast-check/lib/check/property/Property.generic.js:20:31)
at runIt (node_modules/fast-check/lib/check/runner/Runner.js:21:32)
at check (node_modules/fast-check/lib/check/runner/Runner.js:113:11)
at Object.assert (node_modules/fast-check/lib/check/runner/Runner.js:117:15)
at Context. (src/extension-test/unit/cursor-doc/clojure-lexer-test.ts:327:12)
at processImmediate (node:internal/timers:464:21)

[bpringe]

CC @PEZ