Remove duplicated path_to_string conversion

Author: mitaa

src/librustc/middle/ty.rs

@@ -5683,13 +5683,9 @@ impl<'tcx> ctxt<'tcx> {
                                             &format!("a default was defined here..."));
                     }
                     (_, _) => {
-                        let elems = csearch::get_item_path(self, expected.def_id)
-                                        .into_iter()
-                                        .map(|p| p.to_string())
-                                        .collect::<Vec<_>>();
                         self.sess.note(
                             &format!("a default is defined on `{}`",
-                                     elems.join("::")));
+                                     self.item_path_str(expected.def_id)));
                     }
                 }
 
@@ -5704,13 +5700,9 @@ impl<'tcx> ctxt<'tcx> {
                                             &format!("a second default was defined here..."));
                     }
                     (_, _) => {
-                        let elems = csearch::get_item_path(self, found.def_id)
-                                        .into_iter()
-                                        .map(|p| p.to_string())
-                                        .collect::<Vec<_>>();
-
                         self.sess.note(
-                            &format!("a second default is defined on `{}`", elems.join(" ")));
+                            &format!("a second default is defined on `{}`",
+                                     self.item_path_str(found.def_id)));
                     }
                 }