Tweak output for invalid negative impl AST errors

src/test/ui/coherence/coherence-negative-impls-safe.stderr

@@ -1,8 +1,8 @@
 error[E0198]: negative impls cannot be unsafe
-  --> $DIR/coherence-negative-impls-safe.rs:7:1
+  --> $DIR/coherence-negative-impls-safe.rs:7:13
    |
 LL | unsafe impl !Send for TestType {}
-   | ------^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ------      ^^^^^
    | |
    | unsafe because of this
 

src/test/ui/error-codes/E0197.stderr

@@ -2,7 +2,7 @@ error[E0197]: inherent impls cannot be unsafe
   --> $DIR/E0197.rs:3:1
    |
 LL | unsafe impl Foo { }
-   | ------^^^^^^^^^^^^^
+   | ^^^^^^      ^^^ inherent impl for this type
    | |
    | unsafe because of this
 

src/test/ui/error-codes/E0198.stderr

@@ -1,8 +1,8 @@
 error[E0198]: negative impls cannot be unsafe
-  --> $DIR/E0198.rs:5:1
+  --> $DIR/E0198.rs:5:13
    |
 LL | unsafe impl !Send for Foo { }
-   | ------^^^^^^^^^^^^^^^^^^^^^^^
+   | ------      ^^^^^
    | |
    | unsafe because of this
 

src/test/ui/feature-gates/feature-gate-optin-builtin-traits.stderr

@@ -8,10 +8,10 @@ LL | auto trait AutoDummyTrait {}
    = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable
 
 error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
-  --> $DIR/feature-gate-optin-builtin-traits.rs:9:1
+  --> $DIR/feature-gate-optin-builtin-traits.rs:9:6
    |
 LL | impl !AutoDummyTrait for DummyStruct {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |      ^^^^^^^^^^^^^^^
    |
    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
    = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable

src/test/ui/rfc-2632-const-trait-impl/inherent-impl.stderr

@@ -1,18 +1,18 @@
 error: inherent impls cannot be `const`
-  --> $DIR/inherent-impl.rs:9:1
+  --> $DIR/inherent-impl.rs:9:6
    |
 LL | impl const S {}
-   | ^^^^^-----^^^^^
+   |      ^^^^^ ^ inherent impl for this type
    |      |
    |      `const` because of this
    |
    = note: only trait implementations may be annotated with `const`
 
 error: inherent impls cannot be `const`
-  --> $DIR/inherent-impl.rs:12:1
+  --> $DIR/inherent-impl.rs:12:6
    |
 LL | impl const T {}
-   | ^^^^^-----^^^^^
+   |      ^^^^^ ^ inherent impl for this type
    |      |
    |      `const` because of this
    |

src/test/ui/specialization/defaultimpl/validation.stderr

@@ -2,7 +2,7 @@ error: inherent impls cannot be `default`
   --> $DIR/validation.rs:7:1
    |
 LL | default impl S {}
-   | -------^^^^^^^
+   | ^^^^^^^      ^ inherent impl for this type
    | |
    | `default` because of this
    |

src/test/ui/syntax-trait-polarity-feature-gate.stderr

@@ -1,8 +1,8 @@
 error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
-  --> $DIR/syntax-trait-polarity-feature-gate.rs:7:1
+  --> $DIR/syntax-trait-polarity-feature-gate.rs:7:6
    |
 LL | impl !Send for TestType {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |      ^^^^^
    |
    = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
    = help: add `#![feature(optin_builtin_traits)]` to the crate attributes to enable

src/test/ui/syntax-trait-polarity.stderr

@@ -1,28 +1,28 @@
 error: inherent impls cannot be negative
-  --> $DIR/syntax-trait-polarity.rs:7:1
+  --> $DIR/syntax-trait-polarity.rs:7:6
    |
 LL | impl !TestType {}
-   | ^^^^^^^^^^^^^^^^^
+   |      ^
 
 error[E0198]: negative impls cannot be unsafe
-  --> $DIR/syntax-trait-polarity.rs:12:1
+  --> $DIR/syntax-trait-polarity.rs:12:13
    |
 LL | unsafe impl !Send for TestType {}
-   | ------^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ------      ^^^^^
    | |
    | unsafe because of this
 
 error: inherent impls cannot be negative
-  --> $DIR/syntax-trait-polarity.rs:19:1
+  --> $DIR/syntax-trait-polarity.rs:19:9
    |
 LL | impl<T> !TestType2<T> {}
-   | ^^^^^^^^^^^^^^^^^^^^^^^^
+   |         ^
 
 error[E0198]: negative impls cannot be unsafe
-  --> $DIR/syntax-trait-polarity.rs:22:1
+  --> $DIR/syntax-trait-polarity.rs:22:16
    |
 LL | unsafe impl<T> !Send for TestType2<T> {}
-   | ------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | ------         ^^^^^
    | |
    | unsafe because of this
 

src/test/ui/traits/trait-safety-inherent-impl.stderr

@@ -1,14 +1,10 @@
 error[E0197]: inherent impls cannot be unsafe
   --> $DIR/trait-safety-inherent-impl.rs:5:1
    |
-LL |   unsafe impl SomeStruct {
-   |   ^-----
-   |   |
-   |  _unsafe because of this
+LL | unsafe impl SomeStruct {
+   | ^^^^^^      ^^^^^^^^^^ inherent impl for this type
    | |
-LL | |     fn foo(self) { }
-LL | | }
-   | |_^
+   | unsafe because of this
 
 error: aborting due to previous error