Refactor

user/test_pic/src/main.rs

@@ -15,6 +15,7 @@ fn main() {
         test.push('C');
     }
     let mut b = String::from("test");
+    b.write_str("string: uaeuieuei");
     // (&mut b as &mut dyn Write).write_str("string: uaeuieuei");
     syscall::write_string_temp(&b);
     // write(&mut b, Arguments::from_str_nonconst("string: uaeuieuei"));