Update trait-associated-const test to new format

Author: sapphire-arches

src/test/ui/nll/trait-associated-constant.stderr

@@ -9,19 +9,13 @@ error[E0308]: mismatched types
 note: the lifetime 'c as defined on the impl at 30:1...
   --> $DIR/trait-associated-constant.rs:30:1
    |
-30 | / impl<'a: 'b, 'b, 'c> Anything<'a, 'b> for FailStruct1 {
-31 | |     const AC: Option<&'c str> = None;
-32 | |     //~^ ERROR: mismatched types
-33 | | }
-   | |_^
+30 | impl<'a: 'b, 'b, 'c> Anything<'a, 'b> for FailStruct1 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 note: ...does not necessarily outlive the lifetime 'b as defined on the impl at 30:1
   --> $DIR/trait-associated-constant.rs:30:1
    |
-30 | / impl<'a: 'b, 'b, 'c> Anything<'a, 'b> for FailStruct1 {
-31 | |     const AC: Option<&'c str> = None;
-32 | |     //~^ ERROR: mismatched types
-33 | | }
-   | |_^
+30 | impl<'a: 'b, 'b, 'c> Anything<'a, 'b> for FailStruct1 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error[E0308]: mismatched types
   --> $DIR/trait-associated-constant.rs:38:5
@@ -34,19 +28,13 @@ error[E0308]: mismatched types
 note: the lifetime 'a as defined on the impl at 37:1...
   --> $DIR/trait-associated-constant.rs:37:1
    |
-37 | / impl<'a: 'b, 'b> Anything<'a, 'b> for FailStruct2 {
-38 | |     const AC: Option<&'a str> = None;
-39 | |     //~^ ERROR: mismatched types
-40 | | }
-   | |_^
+37 | impl<'a: 'b, 'b> Anything<'a, 'b> for FailStruct2 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 note: ...does not necessarily outlive the lifetime 'b as defined on the impl at 37:1
   --> $DIR/trait-associated-constant.rs:37:1
    |
-37 | / impl<'a: 'b, 'b> Anything<'a, 'b> for FailStruct2 {
-38 | |     const AC: Option<&'a str> = None;
-39 | |     //~^ ERROR: mismatched types
-40 | | }
-   | |_^
+37 | impl<'a: 'b, 'b> Anything<'a, 'b> for FailStruct2 {
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: aborting due to 2 previous errors