Rollup merge of #113285 - GuillaumeGomez:display-long-inline-cfg, r=notriddle

[rustdoc] Fix display of long inline cfg labels

Fixes #87957.
Fixes #112880.

Before:

![Screenshot from 2023-07-03 13-25-47](https://github.com/rust-lang/rust/assets/3050060/401e2c6b-2cfd-4ae3-9d15-b5e1dfec4201)

After:

![Screenshot from 2023-07-03 13-24-49](https://github.com/rust-lang/rust/assets/3050060/e42a34a8-bf60-409d-8a0c-1669d09e7e1e)

r? `@notriddle`

2 files changed, 20 insertions, 1 deletions

diff --git a/tests/rustdoc-gui/label-next-to-symbol.goml b/tests/rustdoc-gui/label-next-to-symbol.goml
index 6c6380256bd..eb603d6c6b6 100644
--- a/tests/rustdoc-gui/label-next-to-symbol.goml
+++ b/tests/rustdoc-gui/label-next-to-symbol.goml
@@ -37,7 +37,6 @@ compare-elements-position: (
     ("y"),
 )
 
-
 // Mobile view
 set-window-size: (600, 600)
 // staggered layout with 2em spacing
@@ -64,3 +63,14 @@ compare-elements-position-false: (
     "//*[@class='desc docblock-short'][text()='a thing with a label']",
     ("y"),
 )
+
+// Ensure it doesn't expand.
+set-window-size: (800, 800)
+go-to: "file://" + |DOC_PATH| + "/test_docs/cfgs/index.html"
+// This part of the tags should not be on the same line as the beginning since the width
+// is too small for that.
+compare-elements-position-false: (
+    "//*[@class='stab portability']/code[text()='appservice-api-c']",
+    "//*[@class='stab portability']/code[text()='server']",
+    ("y"),
+)
diff --git a/tests/rustdoc-gui/src/test_docs/lib.rs b/tests/rustdoc-gui/src/test_docs/lib.rs
index c040fa02dff..ecf3a7cc147 100644
--- a/tests/rustdoc-gui/src/test_docs/lib.rs
+++ b/tests/rustdoc-gui/src/test_docs/lib.rs
@@ -507,3 +507,12 @@ pub mod fields {
         },
     }
 }
+
+pub mod cfgs {
+    #[doc(cfg(all(
+        any(not(feature = "appservice-api-c"), not(feature = "appservice-api-s")),
+        any(not(feature = "client"), not(feature = "server")),
+    )))]
+    /// Some docs.
+    pub mod cfgs {}
+}