add issue links and bless

tests/ui/deref/box-pattern-trait-object-cannot-deref.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/4972
+
 #![feature(box_patterns)]
 
 trait MyTrait {

tests/ui/deref/box-pattern-trait-object-cannot-deref.stderr

@@ -1,5 +1,5 @@
 error[E0033]: type `Box<(dyn MyTrait + 'static)>` cannot be dereferenced
-  --> $DIR/issue-4972.rs:13:25
+  --> $DIR/box-pattern-trait-object-cannot-deref.rs:15:25
    |
 LL |         TraitWrapper::A(box ref map) => map,
    |                         ^^^^^^^^^^^ type `Box<(dyn MyTrait + 'static)>` cannot be dereferenced

tests/ui/deref/deref-impl-for-dyn-trait.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/27697
+
 //@ check-pass
 
 use std::ops::Deref;

tests/ui/deref/deref-mut-closure-drop-order.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/16774
+
 //@ run-pass
 #![feature(box_patterns)]
 

tests/ui/deref/deref-mut-method-through-box.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/26205
+
 //@ check-pass
 #![allow(dead_code)]
 use std::ops::{Deref, DerefMut};

tests/ui/deref/deref-newtype-method-call.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/22992
+
 //@ run-pass
 struct A(B);
 struct B;

tests/ui/deref/deref-newtype-slice-coercion.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/24589
+
 //@ run-pass
 pub struct _X([u8]);
 

tests/ui/deref/deref-target-in-fn-type.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/38381
+
 //@ check-pass
 
 use std::ops::Deref;

tests/ui/deref/deref-to-dyn-fn-mut-callable.rs

@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/26186
+
 //@ check-pass
 use std::sync::Mutex;
 use std::cell::RefCell;