Affects PMD Version: 6.11.0
Rule: NullAssignment
Description:
Should below code really trigger the NullAssignment rule?
Of course I could write "null" instead of null but why should this be worse than wasting a string constant pool place?
Code Sample demonstrating the issue:

throw new IllegalArgumentException(String.format(
        "Unsupported client with class '%s' given",
        (discordClient == null) ? null : discordClient.getClass()));

Running PMD through: Gradle