rustdoc-search: single result for items with multiple paths

This change uses the same "exact" paths as trait implementors
and type alias inlining to track items with multiple
reachable paths. This way, if you search for `vec`, you get
only the `std` exports of it, and not the one from `alloc`.

It still includes all the items in the search index so that
you can search for them by all available paths. For example,
try `core::option` and `std::option`, and notice that the
results page doesn't show duplicates, but still shows all
the items in their respective crates.

1 files changed, 33 insertions, 3 deletions

diff --git a/tests/rustdoc-js-std/vec-new.js b/tests/rustdoc-js-std/vec-new.js
index 9823a417a5d..bb122ff4398 100644
--- a/tests/rustdoc-js-std/vec-new.js
+++ b/tests/rustdoc-js-std/vec-new.js
@@ -3,17 +3,47 @@ const EXPECTED = [
         'query': 'Vec::new',
         'others': [
             { 'path': 'std::vec::Vec', 'name': 'new' },
-            { 'path': 'alloc::vec::Vec', 'name': 'new' },
             { 'path': 'std::vec::Vec', 'name': 'new_in' },
-            { 'path': 'alloc::vec::Vec', 'name': 'new_in' },
+        ],
+    },
+    {
+        'query': 'prelude::vec',
+        'others': [
+            { 'path': 'std::prelude::rust_2024', 'name': 'Vec' },
         ],
     },
     {
         'query': 'Vec new',
         'others': [
             { 'path': 'std::vec::Vec', 'name': 'new' },
-            { 'path': 'alloc::vec::Vec', 'name': 'new' },
             { 'path': 'std::vec::Vec', 'name': 'new_in' },
+        ],
+    },
+    {
+        'query': 'std::Vec::new',
+        'others': [
+            { 'path': 'std::vec::Vec', 'name': 'new' },
+            { 'path': 'std::vec::Vec', 'name': 'new_in' },
+        ],
+    },
+    {
+        'query': 'std Vec new',
+        'others': [
+            { 'path': 'std::vec::Vec', 'name': 'new' },
+            { 'path': 'std::vec::Vec', 'name': 'new_in' },
+        ],
+    },
+    {
+        'query': 'alloc::Vec::new',
+        'others': [
+            { 'path': 'alloc::vec::Vec', 'name': 'new' },
+            { 'path': 'alloc::vec::Vec', 'name': 'new_in' },
+        ],
+    },
+    {
+        'query': 'alloc Vec new',
+        'others': [
+            { 'path': 'alloc::vec::Vec', 'name': 'new' },
             { 'path': 'alloc::vec::Vec', 'name': 'new_in' },
         ],
     },