fix: change string concatenating aligned to RuboCop::Cop::Style::StringConcatenation
fix: change string concatenating aligned to RuboCop::Cop::Style::StringConcatenation

	Checkout issue https://github.com/4commerce-technologies-AG/midi-smtp-server/issues/28 for benchmarking and considerations

4commerce-technologies-AG/midi-smtp-server,4commerce-technologies-AG/midi-smtp-server