rustdoc-search: let From and Into be unboxed

library/core/src/convert/mod.rs

@@ -443,6 +443,7 @@ pub trait AsMut<T: ?Sized> {
 /// [`Vec`]: ../../std/vec/struct.Vec.html
 #[rustc_diagnostic_item = "Into"]
 #[stable(feature = "rust1", since = "1.0.0")]
+#[doc(search_unbox)]
 pub trait Into<T>: Sized {
     /// Converts this type into the (usually inferred) input type.
     #[must_use]
@@ -577,6 +578,7 @@ pub trait Into<T>: Sized {
     all(_Self = "&str", T = "alloc::string::String"),
     note = "to coerce a `{T}` into a `{Self}`, use `&*` as a prefix",
 ))]
+#[doc(search_unbox)]
 pub trait From<T>: Sized {
     /// Converts to this type from the input type.
     #[rustc_diagnostic_item = "from_fn"]

tests/rustdoc-js/impl-trait-inlining.js

@@ -22,4 +22,14 @@ const EXPECTED = [
             },
         ],
     },
+    {
+        'query': 'tyctxt, defid, symbol -> bool',
+        'others': [
+            {
+                'path': 'foo::TyCtxt',
+                'name': 'has_attr',
+                'displayType': "`TyCtxt`, Into<`DefId`>, `Symbol` -> `bool`",
+            },
+        ],
+    },
 ];

tests/rustdoc-js/impl-trait-inlining.rs

@@ -1,4 +1,4 @@
-#![crate_name="foo"]
+#![crate_name = "foo"]
 
 pub struct TyCtxt;
 pub struct DefId;