It's unclear how to suppress check of string literal comparison

[espertus]

The following codes is validated correctly:

@SuppressWarnings({"StringEquality"})
@Incorrect
public class Lint{
  public static void main(String[] args){
    String formatString = "--format";
    if (args[0] == formatString) {
      System.out.println("match");
    }
  }
}

This code, which adds a suppression and has a comparison to a string literal, fails:

@SuppressWarnings({"StringEquality", "StringLiteralEqualityCheck"})
@Incorrect
public class Lint{
  public static void main(String[] args) {
    if (args[0] == "--format") {
      System.out.println("match");
    }
  }
}

I understand the error message that was displayed:

java.lang.IllegalStateException: Invalid error: edu.illinois.cs.cs125.questioner.lib.IncorrectFailedLinting: Incorrect code failed linting with checkstyle
Literal Strings should be compared using equals(), not '=='.

I do not understand how to suppress the error. From searching online, it appears I should disable StringLiteralEqualityCheck; however, doing so had no effect.

How do I know which warning to suppress?

This is low priority, because I can easily work around it.