Fix for #11796 Magento2.2.0 home page product grid issues (li tag)

app/code/Magento/CatalogWidget/view/frontend/templates/product/widget/content/grid.phtml

@@ -35,8 +35,7 @@
                 <ol class="product-items <?= /* @noEscape */ $type ?>">
                     <?php $iterator = 1; ?>
                     <?php foreach ($items as $_item): ?>
-                        <?php $iterator++; ?>
-                        <li class="product-item">
+                        <?= ($iterator++ == 1) ? '<li class="product-item">' : '</li><li class="product-item">' ?>
                         <div class="product-item-info">
                             <a href="<?= $block->escapeUrl($block->getProductUrl($_item)) ?>" class="product-item-photo">
                                 <?= $block->getImage($_item, $image)->toHtml() ?>