Function assert_equalish

cpp/src/test_bits.hpp:49–53

template <class T>
inline void assert_equalish(T want, T got, T delta, const std::string& what)
{
    if (!(fabs(want-got) <= delta))
        throw fail(MSG(what << " " << want << " !=~ " << got));
}

void assert_substring(const std::string& want, const std::string& got, const std::string& what) {
    if (got.find(want) == std::string::npos)