2157   bool need_comma = false;  in operator <<()  local
2163     if (need_comma) out << ", ";  in operator <<()
2165     need_comma = true;  in operator <<()
2169   need_comma = false;  in operator <<()
2171     if (need_comma) out << ", ";  in operator <<()
2174     need_comma = true;  in operator <<()
3001   bool need_comma = false;  in operator <<()  local
3003     if (need_comma) out << ", ";  in operator <<()
3006     need_comma = true;  in operator <<()
3566   bool need_comma = false;  in operator <<()  local
3568     if (need_comma) out << ", ";  in operator <<()
3575     need_comma = true;  in operator <<()