rustdoc-search: show `impl Trait` inline when unhighlighted

While normal generics can be skipped in this case, no-names need
something to show here.

Before: `TyCtxt, , Symbol -> bool`

After: `TyCtxt, Into<DefId>, Symbol -> bool`

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/rustdoc-js/impl-trait-inlining.js b/tests/rustdoc-js/impl-trait-inlining.js
new file mode 100644
index 00000000000..02c9853dd63
--- /dev/null
+++ b/tests/rustdoc-js/impl-trait-inlining.js
@@ -0,0 +1,25 @@
+// exact-check
+// ignore-order
+
+const EXPECTED = [
+    {
+        'query': 'tyctxt, symbol -> bool',
+        'others': [
+            {
+                'path': 'foo::TyCtxt',
+                'name': 'has_attr',
+                'displayType': "`TyCtxt`, Into<DefId>, `Symbol` -> `bool`",
+            },
+        ],
+    },
+    {
+        'query': 'tyctxt, into<defid>, symbol -> bool',
+        'others': [
+            {
+                'path': 'foo::TyCtxt',
+                'name': 'has_attr',
+                'displayType': "`TyCtxt`, `Into`<`DefId`>, `Symbol` -> `bool`",
+            },
+        ],
+    },
+];