Function cleanup

tests/proto.cc:14–20

using namespace snowhouse;

static std::string cleanup(const std::string& s)
{
    auto outs = std::regex_replace(s, std::regex("[ \t\n]+"), " ");
    outs = std::regex_replace(outs, std::regex("^[ \t\n]+"), "");
    outs = std::regex_replace(outs, std::regex("[ \t\n]+$"), "");
    return outs;
}

static void test_setting(void)
{