8dad15bac2
Fixes: #9614 Issue link: https://github.com/spring-projects/spring-integration/issues/9614 The `Matcher.quoteReplacement()` escapes `\` as well as `$`. However, Jackson tries to resolve special symbol from the escaped `$` and fails as `Unrecognized character escape '$' (code 36)` * Fix `SimpleJsonSerializer.toElement()` to escape only `\` **Auto-cherry-pick to `6.3.x` & `6.2.x`**