Function rtrim

examples/example_chat.cpp:201–205

trim from end (in place)

// trim from end (in place)
static inline void rtrim(std::string &s) {
    s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) {
        return !std::isspace(ch);
    }).base(), s.end());
}


// Read the next line of input from stdin, if anything is available.