Function replace

src/util/string/string.cpp:63–71

namespace Util { namespace String {

string replace(const string& s, char a, char b) {
	string r = s;
	size_t i = r.find_first_of(a);
	while (i != string::npos) {
		r[i++] = b;
		i = r.find_first_of(a, i);
	}
	return r;
}

std::string ratio_percentage(const double x, const double y) {
	stringstream ss;