fix: diff view old side showing new side line no

src/component/diff_view.rs

@@ -131,13 +131,13 @@ impl DiffRow {
                 .map(|it| it.highlights_at_line(line))
         }) {
         | Some(highlights) => code_line_with_highlights(
-            self.line.new_line,
+            self.line.old_line,
             content,
             highlights.iter().cloned(),
             marker,
         ),
 
-        | None => code_line(self.line.new_line, content, marker),
+        | None => code_line(self.line.old_line, content, marker),
         }
     }