fix clippy on PartialOrd

Author: sunshowers

src/report.rs

@@ -765,7 +765,7 @@ impl Borrow<str> for XmlString {
 
 impl PartialOrd for XmlString {
     fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        self.data.partial_cmp(&other.data)
+        Some(self.data.cmp(&other.data))
     }
 }