add issue links and bless attribute tests

tests/ui/attributes/attribute-on-wrong-item-inline-repr.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/43988
+
 #![feature(stmt_expr_attributes)]
 
 fn main() {

tests/ui/attributes/attribute-on-wrong-item-inline-repr.stderr

@@ -1,5 +1,5 @@
 error: `#[inline]` attribute cannot be used on statements
-  --> $DIR/issue-43988.rs:5:5
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:7:5
    |
 LL |     #[inline]
    |     ^^^^^^^^^
@@ -7,7 +7,7 @@ LL |     #[inline]
    = help: `#[inline]` can only be applied to functions
 
 error[E0539]: malformed `inline` attribute input
-  --> $DIR/issue-43988.rs:10:5
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:12:5
    |
 LL |     #[inline(XYZ)]
    |     ^^^^^^^^^---^^
@@ -28,7 +28,7 @@ LL +     #[inline]
    |
 
 error: `#[inline]` attribute cannot be used on statements
-  --> $DIR/issue-43988.rs:10:5
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:12:5
    |
 LL |     #[inline(XYZ)]
    |     ^^^^^^^^^^^^^^
@@ -36,7 +36,7 @@ LL |     #[inline(XYZ)]
    = help: `#[inline]` can only be applied to functions
 
 error[E0552]: unrecognized representation hint
-  --> $DIR/issue-43988.rs:15:12
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:17:12
    |
 LL |     #[repr(nothing)]
    |            ^^^^^^^
@@ -45,7 +45,7 @@ LL |     #[repr(nothing)]
    = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html?highlight=repr#representations>
 
 error[E0552]: unrecognized representation hint
-  --> $DIR/issue-43988.rs:19:12
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:21:12
    |
 LL |     #[repr(something_not_real)]
    |            ^^^^^^^^^^^^^^^^^^
@@ -54,7 +54,7 @@ LL |     #[repr(something_not_real)]
    = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html?highlight=repr#representations>
 
 error[E0539]: malformed `repr` attribute input
-  --> $DIR/issue-43988.rs:25:5
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:27:5
    |
 LL |     #[repr]
    |     ^^^^^^^ expected this to be a list
@@ -62,7 +62,7 @@ LL |     #[repr]
    = note: for more information, visit <https://doc.rust-lang.org/reference/type-layout.html#representations>
 
 error[E0539]: malformed `inline` attribute input
-  --> $DIR/issue-43988.rs:31:5
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:33:5
    |
 LL |     #[inline(ABC)]
    |     ^^^^^^^^^---^^
@@ -83,7 +83,7 @@ LL +     #[inline]
    |
 
 error: `#[inline]` attribute cannot be used on expressions
-  --> $DIR/issue-43988.rs:31:5
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:33:5
    |
 LL |     #[inline(ABC)]
    |     ^^^^^^^^^^^^^^
@@ -91,7 +91,7 @@ LL |     #[inline(ABC)]
    = help: `#[inline]` can only be applied to functions
 
 error[E0539]: malformed `repr` attribute input
-  --> $DIR/issue-43988.rs:36:14
+  --> $DIR/attribute-on-wrong-item-inline-repr.rs:38:14
    |
 LL |     let _z = #[repr] 1;
    |              ^^^^^^^ expected this to be a list

tests/ui/attributes/cfg-attr-feature-gate-and-rustc-dummy.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/24434
+
 //@ check-pass
 
 #![cfg_attr(true, feature(rustc_attrs))]

tests/ui/attributes/inline-attribute-on-closure.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/49632
+
 //@ run-pass
 #![feature(stmt_expr_attributes)]
 

tests/ui/attributes/no-mangle-on-const-error.fixed

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/45562
+
 //@ run-rustfix
 
 #![deny(unused_attributes)]

tests/ui/attributes/no-mangle-on-const-error.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/45562
+
 //@ run-rustfix
 
 #![deny(unused_attributes)]

tests/ui/attributes/no-mangle-on-const-error.stderr

@@ -1,5 +1,5 @@
 error: const items should never be `#[no_mangle]`
-  --> $DIR/issue-45562.rs:5:14
+  --> $DIR/no-mangle-on-const-error.rs:7:14
    |
 LL | #[no_mangle] pub const RAH: usize = 5;
    |              ----------^^^^^^^^^^^^^^^