Method addRow

tests/include/catch.hpp:16690–16702

    :   label( std::move( _label ) ),
        colour( _colour ) {}
    SummaryColumn addRow( std::size_t count ) {
        ReusableStringStream rss;
        rss << count;
        std::string row = rss.str();
        for (auto& oldRow : rows) {
            while (oldRow.size() < row.size())
                oldRow = ' ' + oldRow;
            while (oldRow.size() > row.size())
                row = ' ' + row;
        }
        rows.push_back(row);
        return *this;
    }

    std::string label;
    Colour::Code colour;