rustdoc-search: let From and Into be unboxed

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;