correct traversable implementation for listLL

CHANGELOG.md

@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic versioning](http://semver.org/).
 
+## [3.0.1] - 2023-09-28
+
+- fix `Traversable` instance for `ListL`
+
 ## [3.0.0] - 2023-09-27
 
 - added `flake.nix` to provide a development environment

src/Instances/ListL/ListTraversable.php

@@ -75,7 +75,7 @@ public function traverse(Applicative $applicative, callable $f, HK1 $a): HK1
                  * @param HK1<ListBrand, B> $t
                  * @return HK1<ListBrand, B>
                  */
-                static fn (mixed $h, mixed $t): HK1 => ListL::fromBrand($t)->append($h),
+                static fn (mixed $h, mixed $t): HK1 => ListL::fromBrand($t)->prepend($h),
                 $f($c),
                 $d
             ),

src/ListL.php

@@ -52,9 +52,9 @@ public function asNativeList(): array
      * @param A $a
      * @return ListL<A>
      */
-    public function append(mixed $a): self
+    public function prepend(mixed $a): self
     {
-        return new self([...$this->list, ...[$a]]);
+        return new self([...[$a], ...$this->list]);
     }
 
     /**