update test output

Author: estebank

tests/ui/lint/lint-unconditional-recursion.rs

@@ -182,7 +182,7 @@ pub struct Point {
     pub y: f32,
 }
 
-impl Default for Point {
+impl Default for Point { //~ WARN
     fn default() -> Self { //~ ERROR function cannot return without recursing
         Point {
             x: Default::default(),

tests/ui/lint/lint-unconditional-recursion.stderr

@@ -197,5 +197,23 @@ LL |             ..Default::default()
    |
    = help: a `loop` may express intention better if this is on purpose
 
-error: aborting due to 18 previous errors
+warning: `impl Default` that could be derived
+  --> $DIR/lint-unconditional-recursion.rs:185:1
+   |
+LL | / impl Default for Point {
+LL | |     fn default() -> Self {
+LL | |         Point {
+LL | |             x: Default::default(),
+...  |
+LL | |     }
+LL | | }
+   | |_^
+   |
+   = note: `#[warn(default_could_be_derived)]` on by default
+help: you don't need to manually `impl Default`, you can derive it
+   |
+LL ~ #[derive(Default)] pub struct Point {
+   |
+
+error: aborting due to 18 previous errors; 1 warning emitted