Fix checkout street format spacing when multiple streets are present

Author: nfourteen

app/code/Magento/Checkout/view/frontend/web/template/billing-address/details.html

@@ -7,7 +7,7 @@
 <div class="billing-address-details" data-bind="if: isAddressDetailsVisible() && currentBillingAddress()">
     <!-- ko text: currentBillingAddress().prefix --><!-- /ko --> <!-- ko text: currentBillingAddress().firstname --><!-- /ko --> <!-- ko text: currentBillingAddress().middlename --><!-- /ko -->
     <!-- ko text: currentBillingAddress().lastname --><!-- /ko --> <!-- ko text: currentBillingAddress().suffix --><!-- /ko --><br/>
-    <!-- ko text: currentBillingAddress().street --><!-- /ko --><br/>
+    <!-- ko text: _.values(currentBillingAddress().street).join(", ") --><!-- /ko --><br/>
     <!-- ko text: currentBillingAddress().city --><!-- /ko -->, <span data-bind="html: currentBillingAddress().region"></span> <!-- ko text: currentBillingAddress().postcode --><!-- /ko --><br/>
     <!-- ko text: getCountryName(currentBillingAddress().countryId) --><!-- /ko --><br/>
     <!-- ko if: (currentBillingAddress().telephone) -->

app/code/Magento/Checkout/view/frontend/web/template/shipping-information/address-renderer/default.html

@@ -7,7 +7,7 @@
 <!-- ko if: (visible()) -->
     <!-- ko text: address().prefix --><!-- /ko --> <!-- ko text: address().firstname --><!-- /ko --> <!-- ko text: address().middlename --><!-- /ko -->
     <!-- ko text: address().lastname --><!-- /ko --> <!-- ko text: address().suffix --><!-- /ko --><br/>
-    <!-- ko text: address().street --><!-- /ko --><br/>
+    <!-- ko text: _.values(address().street).join(", ") --><!-- /ko --><br/>
     <!-- ko text: address().city --><!-- /ko -->, <span data-bind="html: address().region"></span> <!-- ko text: address().postcode --><!-- /ko --><br/>
     <!-- ko text: getCountryName(address().countryId) --><!-- /ko --><br/>
     <!-- ko if: (address().telephone) -->