Replace .toString to String::new()
@@ -88,7 +88,7 @@ impl ser::Serializer for ConvertToString {
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
- Ok("".to_string())
+ Ok(String::new())
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
