Fix dogfood test

Author: rudyardrichter

clippy_lints/src/use_shared_from_slice.rs

@@ -50,13 +50,14 @@ impl <'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
             if match_type(cx, expr_ty, &paths::RC);
             if match_type(cx, subst.type_at(1), &paths::VEC);
             then {
+                cx.sess().note_without_error(&format!("{:?}", subst));
                 span_lint_and_sugg(
                     cx,
                     USE_SHARED_FROM_SLICE,
                     expr.span,
                     "constructing reference-counted type from vec",
                     "consider using `into()`",
-                    format!("TODO"),
+                    format!("{}", "TODO"),
                 );
             }
         }

tests/ui/use_shared_from_slice.rs

@@ -1,7 +1,7 @@
 use std::rc::Rc;
 
 fn main() {
-    let bad_ref: Rc<Vec<usize>> = Rc::new(vec!(1, 2, 3));
+    let _bad_ref: Rc<Vec<usize>> = Rc::new(vec!(1, 2, 3));
 
-    let good_ref: Rc<[usize]> = vec!(1, 2, 3).into();
+    let _good_ref: Rc<[usize]> = vec!(1, 2, 3).into();
 }