Add URL to test case issues

tests/rustdoc/anchor-id-duplicate-method-name-25001.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/25001
 #![crate_name="issue_25001"]
 
 // @has issue_25001/struct.Foo.html

tests/rustdoc/anchor-id-trait-tymethod-28478.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/28478
 #![crate_name="issue_28478"]
 
 #![feature(associated_type_defaults)]

tests/rustdoc/deduplicate-glob-import-impl-21474.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/21474
 #![crate_name="issue_21474"]
 
 pub use inner::*;

tests/rustdoc/deduplicate-trait-impl-22025.rs

@@ -1,6 +1,7 @@
 // aux-build:issue-22025.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/22025
 #![crate_name="issue_22025"]
 
 extern crate issue_22025;

tests/rustdoc/doctest-hide-empty-line-23106.rs

@@ -1,5 +1,6 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/23106
 #![crate_name="issue_23106"]
 
 /// ```

tests/rustdoc/doctest-markdown-inline-parse-23744.rs

@@ -1,5 +1,6 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/23744
 #![crate_name="issue_23744"]
 
 /// Example of rustdoc incorrectly parsing <code>```rust,should_panic</code>.

tests/rustdoc/doctest-multi-line-string-literal-25944.rs

@@ -1,5 +1,6 @@
 // compile-flags:--test
 
+// https://github.com/rust-lang/rust/issues/25944
 #![crate_name="issue_25944"]
 
 /// ```

tests/rustdoc/extern-fn-22038.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/22038
 #![crate_name="issue_22038"]
 
 extern "C" {

tests/rustdoc/ice-reexport-crate-root-28927.rs

@@ -2,6 +2,7 @@
 // aux-build:issue-28927-1.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/28927
 #![crate_name="issue_28927"]
 
 pub extern crate issue_28927_1 as inner1;

tests/rustdoc/impl-assoc-type-21092.rs

@@ -1,6 +1,7 @@
 // aux-build:issue-21092.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/21092
 #![crate_name="issue_21092"]
 
 extern crate issue_21092;

tests/rustdoc/inline_cross/const-fn-27362.rs

@@ -1,6 +1,7 @@
 // aux-build:issue-27362-aux.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/27362
 #![crate_name="issue_27362"]
 
 extern crate issue_27362_aux;

tests/rustdoc/inline_cross/deduplicate-inlined-items-23207.rs

@@ -2,6 +2,7 @@
 // aux-build:issue-23207-2.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/23207
 #![crate_name="issue_23207"]
 
 extern crate issue_23207_2;

tests/rustdoc/inline_cross/sugar-closure-crate-21801.rs

@@ -1,6 +1,7 @@
 // aux-build:issue-21801.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/21801
 #![crate_name="issue_21801"]
 
 extern crate issue_21801;

tests/rustdoc/macro-doc-comment-23812.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/23812
 #![crate_name="issue_23812"]
 
 macro_rules! doc {

tests/rustdoc/markdown-table-escape-pipe-27862.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/27862
 #![crate_name="issue_27862"]
 
 /// Tests  | Table

tests/rustdoc/search-index-primitive-inherent-method-23511.rs

@@ -2,6 +2,7 @@
 #![feature(rustdoc_internals)]
 #![no_std]
 
+// https://github.com/rust-lang/rust/issues/23511
 #![crate_name="issue_23511"]
 
 pub mod str {

tests/rustdoc/src-link-external-macro-26606.rs

@@ -2,6 +2,7 @@
 // ignore-cross-compile
 // build-aux-docs
 
+// https://github.com/rust-lang/rust/issues/26606
 #![crate_name="issue_26606"]
 
 // @has issue_26606_macro/macro.make_item.html
@@ -9,5 +10,5 @@
 extern crate issue_26606_macro;
 
 // @has issue_26606/constant.FOO.html
-// @has - '//a[@href="../src/issue_26606/src-link-external-macro-26606.rs.html#13"]' 'source'
+// @has - '//a[@href="../src/issue_26606/src-link-external-macro-26606.rs.html#14"]' 'source'
 make_item!(FOO);

tests/rustdoc/src-mod-path-absolute-26995.rs

@@ -1,6 +1,7 @@
 // ignore-windows
 // compile-flags: --no-defaults
 
+// https://github.com/rust-lang/rust/issues/26995
 #![crate_name="issue_26995"]
 
 // @has src/issue_26995/dev/null.html

tests/rustdoc/staged-api-feature-issue-27759.rs

@@ -1,3 +1,4 @@
+// https://github.com/rust-lang/rust/issues/27759
 #![crate_name="issue_27759"]
 
 #![feature(staged_api)]

tests/rustdoc/strip-priv-imports-pass-27104.rs

@@ -2,6 +2,7 @@
 // aux-build:empty.rs
 // ignore-cross-compile
 
+// https://github.com/rust-lang/rust/issues/27104
 #![crate_name="issue_27104"]
 
 // @has issue_27104/index.html