use combinedoutput() to get both stderr and stdout

Author: glaukiol1

os/os.module.go

@@ -197,7 +197,7 @@ func system(self py.Object, args py.Tuple) (py.Object, error) {
 
 	cargs = strings.Split(carg, " ")
 	command := exec.Command(cargs[0], cargs[1:]...)
-	outb, err := command.Output()
+	outb, err := command.CombinedOutput() // - commbinedoutput to get both stderr and stdout -
 	if err != nil {
 		return nil, py.ExceptionNewf(py.OSError, err.Error())
 	}