tests: ui: compile-fail: pinned_drop: wrong_receiver: fix nightly output

Author: BennoLossin

tests/ui/compile-fail/pinned_drop/wrong_receiver.stderr

@@ -2,10 +2,11 @@ error[E0053]: method `drop` has an incompatible type for trait
  --> tests/ui/compile-fail/pinned_drop/wrong_receiver.rs:8:13
   |
 8 |     fn drop(&mut self) {}
-  |             ^^^^^^^^^
-  |             |
-  |             expected `Pin<&mut Foo>`, found `&mut Foo`
-  |             help: change the self-receiver type to match the trait: `self: Pin<&mut Foo>`
+  |             ^^^^^^^^^ expected `Pin<&mut Foo>`, found `&mut Foo`
   |
   = note: expected signature `fn(Pin<&mut Foo>, OnlyCallFromDrop)`
              found signature `fn(&mut Foo, OnlyCallFromDrop)`
+help: change the self-receiver type to match the trait
+  |
+8 |     fn drop(self: Pin<&mut Foo>) {}
+  |             ~~~~~~~~~~~~~~~~~~~