regression of issue #1008 on idea-plugin

[hhktseng]

Previously, when Issue #1008 was reported, it was resolved.

However, with the recent update to the idea-plugin to version 1.27.0, this issue resurfaced.

This piece of code:

switch (value) {
      case 0 -> "it was 0";
      case 1 -> "it was 1";
      case 2 -> "it was 2";
      case null, default -> "unexpected value";
    };

Works fine with the CLI version of google-java-formatter, but will fail for the idea-plugin version of google-java-formatter.

The only solution is to revert the above switch pattern into

      case null -> "null value";
      default -> "unexpected value";

A simple class to allow easy testing of this

public class Test {
    public static void main(String[] args) {
        Object obj = null; // or some other object
        String result = switch (obj) {
            case null, default -> "handled";
        };
        System.out.println(result);
    }
}

JDK Used: https://adoptium.net/en-GB/temurin/releases/?version=21