Method addIndentAndSuffix

unittests/catch.hpp:5349–5351

            }

            auto addIndentAndSuffix(std::string const &plain) const -> std::string {
                return std::string( indent(), ' ' ) + (m_suffix ? plain + "-" : plain);
            }

        public:
            explicit iterator( Column const& column ) : m_column( column ) {