Method printHeaderString

CvPlot/ext/catch2/inc/catch.hpp:16332–16339

if string has a : in first line will set indent to follow it on subsequent lines

// if string has a : in first line will set indent to follow it on
// subsequent lines
void ConsoleReporter::printHeaderString(std::string const& _string, std::size_t indent) {
    std::size_t i = _string.find(": ");
    if (i != std::string::npos)
        i += 2;
    else
        i = 0;
    stream << Column(_string).indent(indent + i).initialIndent(indent) << '\n';
}

struct SummaryColumn {