Method startNewMode

tests/catch.hpp:11998–12001

            addPattern<TestSpec::TagPattern>();
    }
    void TestSpecParser::startNewMode( Mode mode, std::size_t start ) {
        m_mode = mode;
        m_start = start;
    }
    void TestSpecParser::escape() {
        if( m_mode == None )
            m_start = m_pos;