Update JavaScript template for block scaffolding command

Author: gziolo

features/scaffold-block.feature

@@ -57,7 +57,7 @@ Feature: WordPress block code scaffolding
       """
     And the {PLUGIN_DIR}/blocks/the-green-mile/block.js file should contain:
       """
-      title: __( 'The green mile' ),
+      title: __( 'The green mile', 'movies' ),
       """
     And the {PLUGIN_DIR}/blocks/the-green-mile/block.js file should contain:
       """
@@ -81,7 +81,7 @@ Feature: WordPress block code scaffolding
     When I run `wp scaffold block shawshank-redemption --plugin=movies --title="The Shawshank Redemption"`
     Then the {PLUGIN_DIR}/blocks/shawshank-redemption/block.js file should contain:
       """
-      title: __( 'The Shawshank Redemption' ),
+      title: __( 'The Shawshank Redemption', 'movies' ),
       """
     And STDOUT should be:
       """

templates/block-block-js.mustache

@@ -4,7 +4,7 @@
 
 	// Visit https://wordpress.org/gutenberg/handbook/block-api/ to learn about Block API
 	wp.blocks.registerBlockType( '{{namespace}}/{{slug}}', {
-		title: __( '{{title_ucfirst}}' ),
+		title: __( '{{title_ucfirst}}', '{{textdomain}}' ),
 
 		{{#dashicon}}
 		icon: '{{dashicon}}',