Method caseSensitivitySuffix

tutorials/external/catch.hpp:9475–9479

                   : str;
        }
        std::string CasedString::caseSensitivitySuffix() const {
            return m_caseSensitivity == CaseSensitive::No
                   ? " (case insensitive)"
                   : std::string();
        }

        StringMatcherBase::StringMatcherBase( std::string const& operation, CasedString const& comparator )
        : m_comparator( comparator ),