Update os/os.module.go

Co-authored-by: Sebastien Binet <binet@cern.ch>

Author: glaukiol1

os/os.module.go

@@ -243,12 +243,8 @@ func system(self py.Object, args py.Tuple) (py.Object, error) {
 	if len(args) != 1 {
 		return nil, py.ExceptionNewf(py.TypeError, "missing one required argument: 'command:str'")
 	}
-	var cargs []string
-	_carg, ok := args[0].(py.String)
-	if !ok {
-		return nil, py.ExceptionNewf(py.TypeError, "str expected (pos 1), not"+args[0].Type().Name)
-	}
-	carg := strings.ReplaceAll(string(_carg), "'", "\"")
+	arg, ok := args[0].(py.String)
+	if !ok { ... }
 
 	var command *exec.Cmd
 	if runtime.GOOS != "windows" {