API class Location operator <<

[andrejpetras]

operator << for class Location writes to the stream always only the
begin_file and begin_line and not the end_file and end_line.

inline std::ostream &operator<<(std::ostream &out, Location loc) {
    out << loc.begin_file() << ":" << loc.begin_line() << ":" << loc.begin_column();
    bool dash = true;
    bool eq = std::strcmp(loc.begin_file(), loc.end_file()) == 0;
    if (!eq) { out << (dash ? "-" : ":") << loc.begin_file(); dash = false; }
    eq = eq && (loc.begin_line() == loc.end_line());
    if (!eq) { out << (dash ? "-" : ":") << loc.begin_line(); dash = false; }
    eq = eq && (loc.begin_column() == loc.end_column());
    if (!eq) { out << (dash ? "-" : ":") << loc.end_column(); dash = false; }
    return out;
}

[rkaminsk]

You are right. I am going to fix this.