RuboCop 1.55.1

Bug fixes

• #12068: Fix a false positive for Style/ReturnNilInPredicateMethodDefinition when the last method argument in method definition is nil. (@koic)
• #12082: Fix an error for Lint/UselessAssignment when a variable is assigned and unreferenced in for with multiple variables. (@koic)
• #12079: Fix an error for Style/MixinGrouping when mixin method has no arguments. (@koic)
• #11637: Correct Rubocop for private_class_method method documentation. (@bigzed)
• #12070: Fix false positive in Style/ArgumentsForwarding when receiver forwards args/kwargs. (@owst)