Rollup merge of #74351 - lzutao:remove-rustc-internal-compiler-warns, r=Mark-Simulacrum

Do not render unstable items for rustc doc

See the zulip conversion: https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/rustc.20doc.3A.20.22internal.20compiler.20API.22.20warns.20are.20everywhere!/near/203850782

Before:
![image](https://user-images.githubusercontent.com/15225902/87501971-9cff8780-c68a-11ea-93b4-ea53ce18a77b.png)
After:
![image](https://user-images.githubusercontent.com/15225902/87501985-a7218600-c68a-11ea-81c0-a6b5b120832c.png)

Nothing changes in unstable items of std:
Before:
![image](https://user-images.githubusercontent.com/15225902/87502004-b7d1fc00-c68a-11ea-9224-a27a1d2a81d6.png)
After:
![image](https://user-images.githubusercontent.com/15225902/87502018-c0c2cd80-c68a-11ea-9773-4c63158025cb.png)

Closes  #54682

1 files changed, 6 insertions, 4 deletions

diff --git a/src/test/rustdoc/internal.rs b/src/test/rustdoc/internal.rs
index 2cb7c472cc8..a1e322fb9a3 100644
--- a/src/test/rustdoc/internal.rs
+++ b/src/test/rustdoc/internal.rs
@@ -1,11 +1,13 @@
 // compile-flags: -Z force-unstable-if-unmarked
 
-// @matches internal/index.html '//*[@class="docblock-short"]/span[@class="stab internal"]' \
-//      'Internal'
+// Check that the unstable marker is not added for "rustc_private".
+
+// @!matches internal/index.html '//*[@class="docblock-short"]/span[@class="stab unstable"]'
+// @!matches internal/index.html '//*[@class="docblock-short"]/span[@class="stab internal"]'
 // @matches - '//*[@class="docblock-short"]' 'Docs'
 
-// @has internal/struct.S.html '//*[@class="stab internal"]' \
-//      'This is an internal compiler API. (rustc_private)'
+// @!has internal/struct.S.html '//*[@class="stab unstable"]'
+// @!has internal/struct.S.html '//*[@class="stab internal"]'
 /// Docs
 pub struct S;