Test fixes from the rollup

Author: alexcrichton

src/test/compile-fail/coherence-overlapping-inherent-impl-trait.rs

@@ -13,5 +13,6 @@
 
 trait C {}
 impl C { fn f() {} } //~ ERROR duplicate definitions with name `f`
+//~^ WARN: this was previously accepted
 impl C { fn f() {} }
 fn main() { }

src/test/compile-fail/feature-gate-dropck-ugeh.rs

@@ -28,6 +28,7 @@ struct Foo<T> { data: Vec<T> }
 impl<T> Drop for Foo<T> {
     #[unsafe_destructor_blind_to_params] // This is the UGEH attribute
     //~^ ERROR unsafe_destructor_blind_to_params has been replaced
+    //~^^ WARN: use of deprecated attribute
     fn drop(&mut self) { }
 }
 

src/test/ui/compare-method/proj-outlives-region.stderr

@@ -1,4 +1,4 @@
-error[E0276]: impl has stricter requirements than trait
+error[E0276]: impl has stricter requirements than trait, #[deny(extra_requirement_in_impl)] on by default
   --> $DIR/proj-outlives-region.rs:22:5
    |
 17 |     fn foo() where T: 'a;
@@ -9,11 +9,6 @@ error[E0276]: impl has stricter requirements than trait
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #37166 <https://github.com/rust-lang/rust/issues/37166>
-note: lint level defined here
-  --> $DIR/proj-outlives-region.rs:12:9
-   |
-12 | #![deny(extra_requirement_in_impl)]
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error
 

src/test/ui/compare-method/region-unrelated.stderr

@@ -1,4 +1,4 @@
-error[E0276]: impl has stricter requirements than trait
+error[E0276]: impl has stricter requirements than trait, #[deny(extra_requirement_in_impl)] on by default
   --> $DIR/region-unrelated.rs:22:5
    |
 17 |     fn foo() where T: 'a;
@@ -9,11 +9,6 @@ error[E0276]: impl has stricter requirements than trait
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #37166 <https://github.com/rust-lang/rust/issues/37166>
-note: lint level defined here
-  --> $DIR/region-unrelated.rs:12:9
-   |
-12 | #![deny(extra_requirement_in_impl)]
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to previous error