Fix changelog

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 ### Fixed
-- Problem that caused the product impression event to be sent for every event on the shelf, including the ones that were't seen yet.
+- Problem that caused the product impression event to be sent for every item on the shelf, including the ones that were't seen yet.
 
 ### Changed
 - The `ProductImpression` is now handled by the `product-context-list` app.

react/Shelf.js

@@ -106,16 +106,8 @@ const options = {
   }) => ({
     ssr: true,
     variables: {
-      ...(category != null
-        ? {
-            category: category.toString(),
-          }
-        : {}),
-      ...(collection != null
-        ? {
-            collection: collection.toString(),
-          }
-        : {}),
+      ...(category && { category: category.toString() }),
+      ...(collection && { collection: collection.toString() }),
       specificationFilters: specificationFilters.map(parseFilters),
       orderBy,
       from: 0,