如何删除最终输出中的最后一个空格？

output = "This is the output "
output = output.rstrip()
print(output)

var output = "This is the output ";
output = output.replace(/\s+$/, "");
console.log(output);

#include <iostream>
#include <string>
using namespace std;

int main() {
    string output = "This is the output ";
    if (output.back() == ' ') {
        output.pop_back();
    }
    cout << output << endl;
    return 0;
}