use fileline_ and not full span_ for the followon messages

src/librustc/lint/context.rs

@@ -451,8 +451,8 @@ pub fn raw_struct_lint<'a>(sess: &'a Session,
         let citation = format!("for more information, see {}",
                                future_incompatible.reference);
         if let Some(sp) = span {
-            err.span_warn(sp, &explanation);
-            err.span_note(sp, &citation);
+            err.fileline_warn(sp, &explanation);
+            err.fileline_note(sp, &citation);
         } else {
             err.warn(&explanation);
             err.note(&citation);

src/libsyntax/errors/mod.rs

@@ -200,6 +200,13 @@ pub fn span_end_note(&mut self ,
         self.sub(Level::Note, msg, Some(sp), Some(EndSpan(sp)));
         self
     }
+    pub fn fileline_warn(&mut self ,
+                         sp: Span,
+                         msg: &str)
+                         -> &mut DiagnosticBuilder<'a>  {
+        self.sub(Level::Warning, msg, Some(sp), Some(FileLine(sp)));
+        self
+    }
     pub fn fileline_note(&mut self ,
                          sp: Span,
                          msg: &str)