Newline characters should not be escaped

[saig0]

Describe the bug
If a string literal contains a newline character \n, the newline is escaped and returned as \\n.

"Hello\nWorld"
// "Hello\\nWorld"

The behavior is different if the newline character is stored in a string variable and the variable is referenced in the expression. In this case, the newline is not escaped.

x
// "Hello\nWorld"

To Reproduce
Steps to reproduce the behavior:

1. Evaluate the expression "Hello\nWorld"
2. Verify that the newline character is escaped

Expected behavior
A newline character in a string literal is not escaped. The string is returned in its original form.

"Hello\nWorld"
// "Hello\nWorld"

Environment

• FEEL engine version: 1.15.0+
• Affects:
  • Camunda Automation Platform 7: [7.x]
  • Zeebe broker: 8.0.2+: Inconsistent/unnecessary escaping of characters in inputs camunda#9859