boolean with arity=0 and defaultValue=false behaves unexpectedly #2380
Description
@CommandLine.Option(names = "--flag", arity = "0")
boolean flag;results in false when --flag is not used ✅
@CommandLine.Option(names = "--flag", arity = "0", defaultValue = "false")
boolean flagresults in true when --flag is not used ❌
@CommandLine.Option(names = "--flag", defaultValue = "false")
boolean flagresults in false when --flag is not used ✅
@CommandLine.Option(names = "--flag", defaultValue = "true")
boolean flagresults in true when --flag is not used ✅