Function rtrim

src/univalue/test/unitester.cpp:26–30

#define f_assert(expr) { if (!(expr)) { test_failed = true; fprintf(stderr, "%s failed\n", __func__); } }

static std::string rtrim(std::string s)
{
    s.erase(s.find_last_not_of(" \n\r\t")+1);
    return s;
}

static void runtest(std::string filename, const std::string& jdata)
{