diff --git a/wp-content/themes/twentyfifteen/404.php b/wp-content/themes/twentyfifteen/404.php
index e90e5dd3d8..9eedb3aace 100644
--- a/wp-content/themes/twentyfifteen/404.php
+++ b/wp-content/themes/twentyfifteen/404.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying 404 pages (not found).
+ * The template for displaying 404 pages (not found)
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -27,4 +27,4 @@ get_header(); ?>
 		</main><!-- .site-main -->
 	</div><!-- .content-area -->
 
-<?php get_footer(); ?>
\ No newline at end of file
+<?php get_footer(); ?>
diff --git a/wp-content/themes/twentyfifteen/archive.php b/wp-content/themes/twentyfifteen/archive.php
index 1a9f70609c..495d6341fa 100644
--- a/wp-content/themes/twentyfifteen/archive.php
+++ b/wp-content/themes/twentyfifteen/archive.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying archive pages.
+ * The template for displaying archive pages
  *
  * Used to display archive-type pages if nothing more specific matches a query.
  * For example, puts together date-based pages if no date.php file exists.
@@ -10,7 +10,7 @@
  * already has tag.php for Tag archives, category.php for Category archives,
  * and author.php for Author archives.
  *
- * @link http://codex.wordpress.org/Template_Hierarchy
+ * @link https://codex.wordpress.org/Template_Hierarchy
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -31,34 +31,35 @@ get_header(); ?>
 				?>
 			</header><!-- .page-header -->
 
-			<?php /* Start the Loop */ ?>
-			<?php while ( have_posts() ) : the_post(); ?>
-
-				<?php
-					/* Include the Post-Format-specific template for the content.
-					 * If you want to override this in a child theme, then include a file
-					 * called content-___.php (where ___ is the Post Format name) and that will be used instead.
-					 */
-					get_template_part( 'content', get_post_format() );
-				?>
-
-			<?php endwhile; ?>
-
 			<?php
-				the_pagination( array(
-					'prev_text'          => __( 'Previous page', 'twentyfifteen' ),
-					'next_text'          => __( 'Next page', 'twentyfifteen' ),
-					'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
-				) );
-			?>
+			// Start the Loop.
+			while ( have_posts() ) : the_post();
 
-		<?php else : ?>
+				/*
+				 * Include the Post-Format-specific template for the content.
+				 * If you want to override this in a child theme, then include a file
+				 * called content-___.php (where ___ is the Post Format name) and that will be used instead.
+				 */
+				get_template_part( 'content', get_post_format() );
 
-			<?php get_template_part( 'content', 'none' ); ?>
+			// End the loop.
+			endwhile;
 
-		<?php endif; ?>
+			// Previous/next page navigation.
+			the_pagination( array(
+				'prev_text'          => __( 'Previous page', 'twentyfifteen' ),
+				'next_text'          => __( 'Next page', 'twentyfifteen' ),
+				'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
+			) );
+
+		// If no content, include the "No posts found" template.
+		else :
+			get_template_part( 'content', 'none' );
+
+		endif;
+		?>
 
 		</main><!-- .site-main -->
 	</section><!-- .content-area -->
 
-<?php get_footer(); ?>
\ No newline at end of file
+<?php get_footer(); ?>
diff --git a/wp-content/themes/twentyfifteen/author-bio.php b/wp-content/themes/twentyfifteen/author-bio.php
index 20378b7ad3..839df911f4 100644
--- a/wp-content/themes/twentyfifteen/author-bio.php
+++ b/wp-content/themes/twentyfifteen/author-bio.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying Author bios.
+ * The template for displaying Author bios
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -20,16 +20,20 @@
 		 * @param int $size The avatar height and width size in pixels.
 		 */
 		$author_bio_avatar_size = apply_filters( 'twentyfifteen_author_bio_avatar_size', 56 );
+
 		echo get_avatar( get_the_author_meta( 'user_email' ), $author_bio_avatar_size );
 		?>
 	</div><!-- .author-avatar -->
+
 	<div class="author-description">
 		<h3 class="author-title"><?php echo get_the_author(); ?></h3>
+
 		<p class="author-bio">
 			<?php the_author_meta( 'description' ); ?>
 			<a class="author-link" href="<?php echo esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ); ?>" rel="author">
 				<?php printf( __( 'View all posts by %s', 'twentyfifteen' ), get_the_author() ); ?>
 			</a>
 		</p><!-- .author-bio -->
+
 	</div><!-- .author-description -->
-</div><!-- .author-info -->
\ No newline at end of file
+</div><!-- .author-info -->
diff --git a/wp-content/themes/twentyfifteen/comments.php b/wp-content/themes/twentyfifteen/comments.php
index 8958ad336c..e1be95e56d 100644
--- a/wp-content/themes/twentyfifteen/comments.php
+++ b/wp-content/themes/twentyfifteen/comments.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying comments.
+ * The template for displaying comments
  *
  * The area of the page that contains both current comments
  * and the comment form.
@@ -55,4 +55,4 @@ if ( post_password_required() ) {
 
 	<?php comment_form(); ?>
 
-</div><!-- .comments-area -->
\ No newline at end of file
+</div><!-- .comments-area -->
diff --git a/wp-content/themes/twentyfifteen/content-link.php b/wp-content/themes/twentyfifteen/content-link.php
index 8133e8974a..07f359900b 100644
--- a/wp-content/themes/twentyfifteen/content-link.php
+++ b/wp-content/themes/twentyfifteen/content-link.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying link post formats.
+ * The template for displaying link post formats
  *
  * Used for both single and index/archive/search.
  *
@@ -45,6 +45,7 @@
 	<!-- .entry-content -->
 
 	<?php
+		// Author bio.
 		if ( is_single() && get_the_author_meta( 'description' ) ) :
 			get_template_part( 'author-bio' );
 		endif;
@@ -55,4 +56,5 @@
 		<?php edit_post_link( esc_html__( 'Edit', 'twentyfifteen' ), '<span class="edit-link">', '</span>' ); ?>
 	</footer>
 	<!-- .entry-footer -->
-</article><!-- #post-## -->
\ No newline at end of file
+
+</article><!-- #post-## -->
diff --git a/wp-content/themes/twentyfifteen/content-none.php b/wp-content/themes/twentyfifteen/content-none.php
index 01d50a9da2..63998419e0 100644
--- a/wp-content/themes/twentyfifteen/content-none.php
+++ b/wp-content/themes/twentyfifteen/content-none.php
@@ -1,8 +1,8 @@
 <?php
 /**
- * The template part for displaying a message that posts cannot be found.
+ * The template part for displaying a message that posts cannot be found
  *
- * Learn more: http://codex.wordpress.org/Template_Hierarchy
+ * Learn more: {@link https://codex.wordpress.org/Template_Hierarchy}
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -16,6 +16,7 @@
 	</header><!-- .page-header -->
 
 	<div class="page-content">
+
 		<?php if ( is_home() && current_user_can( 'publish_posts' ) ) : ?>
 
 			<p><?php printf( __( 'Ready to publish your first post? <a href="%1$s">Get started here</a>.', 'twentyfifteen' ), esc_url( admin_url( 'post-new.php' ) ) ); ?></p>
@@ -31,5 +32,6 @@
 			<?php get_search_form(); ?>
 
 		<?php endif; ?>
+
 	</div><!-- .page-content -->
-</section><!-- .no-results -->
\ No newline at end of file
+</section><!-- .no-results -->
diff --git a/wp-content/themes/twentyfifteen/content-page.php b/wp-content/themes/twentyfifteen/content-page.php
index 0b565107fe..058b59b678 100644
--- a/wp-content/themes/twentyfifteen/content-page.php
+++ b/wp-content/themes/twentyfifteen/content-page.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template used for displaying page content.
+ * The template used for displaying page content
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -9,7 +9,10 @@
 ?>
 
 <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
-	<?php twentyfifteen_post_thumbnail(); ?>
+	<?php
+		// Post thumbnail.
+		twentyfifteen_post_thumbnail();
+	?>
 
 	<header class="entry-header">
 		<?php the_title( '<h1 class="entry-title">', '</h1>' ); ?>
@@ -31,4 +34,4 @@
 
 	<?php edit_post_link( esc_html__( 'Edit', 'twentyfifteen' ), '<footer class="entry-footer"><span class="edit-link">', '</span></footer><!-- .entry-footer -->' ); ?>
 
-</article><!-- #post-## -->
\ No newline at end of file
+</article><!-- #post-## -->
diff --git a/wp-content/themes/twentyfifteen/content-search.php b/wp-content/themes/twentyfifteen/content-search.php
index 05fa74d8c8..77843c8f72 100644
--- a/wp-content/themes/twentyfifteen/content-search.php
+++ b/wp-content/themes/twentyfifteen/content-search.php
@@ -1,8 +1,8 @@
 <?php
 /**
- * The template part for displaying results in search pages.
+ * The template part for displaying results in search pages
  *
- * Learn more: http://codex.wordpress.org/Template_Hierarchy
+ * Learn more: {@link https://codex.wordpress.org/Template_Hierarchy}
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -22,11 +22,16 @@
 	</div><!-- .entry-summary -->
 
 	<?php if ( 'post' == get_post_type() ) : ?>
+
 		<footer class="entry-footer">
 			<?php twentyfifteen_entry_meta(); ?>
 			<?php edit_post_link( esc_html__( 'Edit', 'twentyfifteen' ), '<span class="edit-link">', '</span>' ); ?>
 		</footer><!-- .entry-footer -->
+
 	<?php else : ?>
+
 		<?php edit_post_link( esc_html__( 'Edit', 'twentyfifteen' ), '<footer class="entry-footer"><span class="edit-link">', '</span></footer><!-- .entry-footer -->' ); ?>
+
 	<?php endif; ?>
-</article><!-- #post-## -->
\ No newline at end of file
+
+</article><!-- #post-## -->
diff --git a/wp-content/themes/twentyfifteen/content.php b/wp-content/themes/twentyfifteen/content.php
index 333b266a09..2dddf74121 100644
--- a/wp-content/themes/twentyfifteen/content.php
+++ b/wp-content/themes/twentyfifteen/content.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The default template for displaying content.
+ * The default template for displaying content
  *
  * Used for both single and index/archive/search.
  *
@@ -11,7 +11,10 @@
 ?>
 
 <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
-	<?php twentyfifteen_post_thumbnail(); ?>
+	<?php
+		// Post thumbnail.
+		twentyfifteen_post_thumbnail();
+	?>
 
 	<header class="entry-header">
 		<?php
@@ -43,6 +46,7 @@
 	</div><!-- .entry-content -->
 
 	<?php
+		// Author bio.
 		if ( is_single() && get_the_author_meta( 'description' ) ) :
 			get_template_part( 'author-bio' );
 		endif;
@@ -52,4 +56,5 @@
 		<?php twentyfifteen_entry_meta(); ?>
 		<?php edit_post_link( esc_html__( 'Edit', 'twentyfifteen' ), '<span class="edit-link">', '</span>' ); ?>
 	</footer><!-- .entry-footer -->
-</article><!-- #post-## -->
\ No newline at end of file
+
+</article><!-- #post-## -->
diff --git a/wp-content/themes/twentyfifteen/footer.php b/wp-content/themes/twentyfifteen/footer.php
index 473bbe6977..ef5bd02357 100644
--- a/wp-content/themes/twentyfifteen/footer.php
+++ b/wp-content/themes/twentyfifteen/footer.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying the footer.
+ * The template for displaying the footer
  *
  * Contains the closing of the "site-content" div and all content after.
  *
@@ -22,12 +22,13 @@
 				 */
 				do_action( 'twentyfifteen_credits' );
 			?>
-			<a href="<?php echo esc_url( __( 'http://wordpress.org/', 'twentyfifteen' ) ); ?>"><?php printf( esc_html__( 'Proudly powered by %s', 'twentyfifteen' ), 'WordPress' ); ?></a>
+			<a href="<?php echo esc_url( __( 'https://wordpress.org/', 'twentyfifteen' ) ); ?>"><?php printf( esc_html__( 'Proudly powered by %s', 'twentyfifteen' ), 'WordPress' ); ?></a>
 		</div><!-- .site-info -->
 	</footer><!-- .site-footer -->
+
 </div><!-- .site -->
 
 <?php wp_footer(); ?>
 
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/wp-content/themes/twentyfifteen/functions.php b/wp-content/themes/twentyfifteen/functions.php
index ebba907252..7fc5374fc2 100644
--- a/wp-content/themes/twentyfifteen/functions.php
+++ b/wp-content/themes/twentyfifteen/functions.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * Twenty Fifteen functions and definitions.
+ * Twenty Fifteen functions and definitions
  *
  * Set up the theme and provides some helper functions, which are used in the
  * theme as custom template tags. Others are attached to action and filter
@@ -11,14 +11,14 @@
  * functions.php file. The child theme's functions.php file is included before
  * the parent theme's file, so the child theme functions would be used.
  *
- * @link http://codex.wordpress.org/Theme_Development
- * @link http://codex.wordpress.org/Child_Themes
+ * @link https://codex.wordpress.org/Theme_Development
+ * @link https://codex.wordpress.org/Child_Themes
  *
  * Functions that are not pluggable (not wrapped in function_exists()) are
  * instead attached to a filter or action hook.
  *
  * For more information on hooks, actions, and filters,
- * @link http://codex.wordpress.org/Plugin_API
+ * {@link https://codex.wordpress.org/Plugin_API}
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -75,7 +75,7 @@ function twentyfifteen_setup() {
 	/*
 	 * Enable support for Post Thumbnails on posts and pages.
 	 *
-	 * @link http://codex.wordpress.org/Function_Reference/add_theme_support#Post_Thumbnails
+	 * See: https://codex.wordpress.org/Function_Reference/add_theme_support#Post_Thumbnails
 	 */
 	add_theme_support( 'post-thumbnails' );
 	set_post_thumbnail_size( 825, 510, true );
@@ -96,7 +96,8 @@ function twentyfifteen_setup() {
 
 	/*
 	 * Enable support for Post Formats.
-	 * See http://codex.wordpress.org/Post_Formats
+	 *
+	 * See: https://codex.wordpress.org/Post_Formats
 	 */
 	add_theme_support( 'post-formats', array(
 		'aside', 'image', 'video', 'quote', 'link', 'gallery', 'status', 'audio', 'chat'
@@ -125,7 +126,7 @@ add_action( 'after_setup_theme', 'twentyfifteen_setup' );
  *
  * @since Twenty Fifteen 1.0
  *
- * @link http://codex.wordpress.org/Function_Reference/register_sidebar
+ * @link https://codex.wordpress.org/Function_Reference/register_sidebar
  */
 function twentyfifteen_widgets_init() {
 	register_sidebar( array(
diff --git a/wp-content/themes/twentyfifteen/header.php b/wp-content/themes/twentyfifteen/header.php
index f6a3852f2e..dd5ec01eeb 100644
--- a/wp-content/themes/twentyfifteen/header.php
+++ b/wp-content/themes/twentyfifteen/header.php
@@ -1,8 +1,8 @@
 <?php
 /**
- * The header for our theme.
+ * The template for displaying the header
  *
- * Displays all of the <head> section and everything up until the "site-content" div.
+ * Displays all of the &lt;head&gt; section and everything up until the "site-content" div.
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -48,4 +48,4 @@
 		<?php get_sidebar(); ?>
 	</div><!-- .sidebar -->
 
-	<div id="content" class="site-content">
\ No newline at end of file
+	<div id="content" class="site-content">
diff --git a/wp-content/themes/twentyfifteen/image.php b/wp-content/themes/twentyfifteen/image.php
index 6932b6b6b1..c0a5ef8feb 100644
--- a/wp-content/themes/twentyfifteen/image.php
+++ b/wp-content/themes/twentyfifteen/image.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying all single posts and attachments.
+ * The template for displaying image attachments
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -12,9 +12,13 @@ get_header(); ?>
 	<div id="primary" class="content-area">
 		<main id="main" class="site-main" role="main">
 
-			<?php while ( have_posts() ) : the_post(); ?>
+			<?php
+				// Start the loop.
+				while ( have_posts() ) : the_post();
+			?>
 
 				<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
+
 					<nav id="image-navigation" class="navigation image-navigation">
 						<div class="nav-links">
 							<div class="nav-previous"><?php previous_image_link( false, esc_html__( 'Previous Image', 'twentyfifteen' ) ); ?></div><div class="nav-next"><?php next_image_link( false, esc_html__( 'Next Image', 'twentyfifteen' ) ); ?></div>
@@ -26,6 +30,7 @@ get_header(); ?>
 					</header><!-- .entry-header -->
 
 					<div class="entry-content">
+
 						<div class="entry-attachment">
 							<?php
 								/**
@@ -36,6 +41,7 @@ get_header(); ?>
 								 * @param string $image_size Image size. Default 'large'.
 								 */
 								$image_size = apply_filters( 'twentyfifteen_attachment_size', 'large' );
+
 								echo wp_get_attachment_image( get_the_ID(), $image_size );
 							?>
 
@@ -44,6 +50,7 @@ get_header(); ?>
 									<?php the_excerpt(); ?>
 								</div><!-- .entry-caption -->
 							<?php endif; ?>
+
 						</div><!-- .entry-attachment -->
 
 						<?php
@@ -63,6 +70,7 @@ get_header(); ?>
 						<?php twentyfifteen_entry_meta(); ?>
 						<?php edit_post_link( esc_html__( 'Edit', 'twentyfifteen' ), '<span class="edit-link">', '</span>' ); ?>
 					</footer><!-- .entry-footer -->
+
 				</article><!-- #post-## -->
 
 				<?php
@@ -70,17 +78,17 @@ get_header(); ?>
 					if ( comments_open() || get_comments_number() ) :
 						comments_template();
 					endif;
-				?>
 
-				<?php
+					// Previous/next post navigation.
 					the_post_navigation( array(
 						'prev_text' => _x( '<span class="meta-nav">Published in</span><span class="post-title">%title</span>', 'Parent post link', 'twentyfifteen' ),
 					) );
-				?>
 
-			<?php endwhile; // end of the loop. ?>
+				// End the loop.
+				endwhile;
+			?>
 
 		</main><!-- .site-main -->
 	</div><!-- .content-area -->
 
-<?php get_footer(); ?>
\ No newline at end of file
+<?php get_footer(); ?>
diff --git a/wp-content/themes/twentyfifteen/index.php b/wp-content/themes/twentyfifteen/index.php
index 937021490b..2f98a1c325 100644
--- a/wp-content/themes/twentyfifteen/index.php
+++ b/wp-content/themes/twentyfifteen/index.php
@@ -1,14 +1,13 @@
 <?php
 /**
- * The main template file.
+ * The main template file
  *
  * This is the most generic template file in a WordPress theme
  * and one of the two required files for a theme (the other being style.css).
  * It is used to display a page when nothing more specific matches a query.
  * e.g., it puts together the home page when no home.php file exists.
- * Learn more: http://codex.wordpress.org/Template_Hierarchy
  *
- * @link http://codex.wordpress.org/Template_Hierarchy
+ * Learn more: {@link https://codex.wordpress.org/Template_Hierarchy}
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -28,33 +27,35 @@ get_header(); ?>
 				</header>
 			<?php endif; ?>
 
-			<?php while ( have_posts() ) : the_post(); ?>
-
-				<?php
-					/* Include the Post-Format-specific template for the content.
-					 * If you want to override this in a child theme, then include a file
-					 * called content-___.php (where ___ is the Post Format name) and that will be used instead.
-					 */
-					get_template_part( 'content', get_post_format() );
-				?>
-
-			<?php endwhile; ?>
-
 			<?php
-				the_pagination( array(
-					'prev_text'          => __( 'Previous page', 'twentyfifteen' ),
-					'next_text'          => __( 'Next page', 'twentyfifteen' ),
-					'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
-				) );
-			?>
+			// Start the loop.
+			while ( have_posts() ) : the_post();
 
-		<?php else : ?>
+				/*
+				 * Include the Post-Format-specific template for the content.
+				 * If you want to override this in a child theme, then include a file
+				 * called content-___.php (where ___ is the Post Format name) and that will be used instead.
+				 */
+				get_template_part( 'content', get_post_format() );
 
-			<?php get_template_part( 'content', 'none' ); ?>
+			// End the loop.
+			endwhile;
 
-		<?php endif; ?>
+			// Previous/next page navigation.
+			the_pagination( array(
+				'prev_text'          => __( 'Previous page', 'twentyfifteen' ),
+				'next_text'          => __( 'Next page', 'twentyfifteen' ),
+				'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
+			) );
+
+		// If no content, include the "No posts found" template.
+		else :
+			get_template_part( 'content', 'none' );
+
+		endif;
+		?>
 
 		</main><!-- .site-main -->
 	</div><!-- .content-area -->
 
-<?php get_footer(); ?>
\ No newline at end of file
+<?php get_footer(); ?>
diff --git a/wp-content/themes/twentyfifteen/page.php b/wp-content/themes/twentyfifteen/page.php
index 6423d4d70e..5c7a0b077a 100644
--- a/wp-content/themes/twentyfifteen/page.php
+++ b/wp-content/themes/twentyfifteen/page.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying pages.
+ * The template for displaying pages
  *
  * This is the template that displays all pages by default.
  * Please note that this is the WordPress construct of pages and that
@@ -16,20 +16,23 @@ get_header(); ?>
 	<div id="primary" class="content-area">
 		<main id="main" class="site-main" role="main">
 
-		<?php while ( have_posts() ) : the_post(); ?>
+		<?php
+		// Start the loop.
+		while ( have_posts() ) : the_post();
 
-			<?php get_template_part( 'content', 'page' ); ?>
+			// Include the page content template.
+			get_template_part( 'content', 'page' );
 
-			<?php
-				// If comments are open or we have at least one comment, load up the comment template
-				if ( comments_open() || get_comments_number() ) :
-					comments_template();
-				endif;
-			?>
+			// If comments are open or we have at least one comment, load up the comment template.
+			if ( comments_open() || get_comments_number() ) :
+				comments_template();
+			endif;
 
-		<?php endwhile; // end of the loop. ?>
+		// End the loop.
+		endwhile;
+		?>
 
 		</main><!-- .site-main -->
 	</div><!-- .content-area -->
 
-<?php get_footer(); ?>
\ No newline at end of file
+<?php get_footer(); ?>
diff --git a/wp-content/themes/twentyfifteen/rtl.css b/wp-content/themes/twentyfifteen/rtl.css
index a1c6f81f3c..5d460bb626 100644
--- a/wp-content/themes/twentyfifteen/rtl.css
+++ b/wp-content/themes/twentyfifteen/rtl.css
@@ -4,7 +4,7 @@ Description: Adds support for languages written in a Right To Left (RTL) directi
 It's easy, just a matter of overwriting all the horizontal positioning attributes
 of your CSS stylesheet in a separate stylesheet file named rtl.css.
 
-See http://codex.wordpress.org/Right_to_Left_Language_Support
+See: https://codex.wordpress.org/Right_to_Left_Language_Support
 */
 
 /**
diff --git a/wp-content/themes/twentyfifteen/search.php b/wp-content/themes/twentyfifteen/search.php
index b0f5dd8b95..3bd5ffdd9b 100644
--- a/wp-content/themes/twentyfifteen/search.php
+++ b/wp-content/themes/twentyfifteen/search.php
@@ -18,33 +18,34 @@ get_header(); ?>
 				<h1 class="page-title"><?php printf( esc_html__( 'Search Results for: %s', 'twentyfifteen' ), get_search_query() ); ?></h1>
 			</header><!-- .page-header -->
 
-			<?php /* Start the Loop */ ?>
-			<?php while ( have_posts() ) : the_post(); ?>
+			<?php
+			// Start the loop.
+			while ( have_posts() ) : the_post(); ?>
 
 				<?php
-				/**
+				/*
 				 * Run the loop for the search to output the results.
 				 * If you want to overload this in a child theme then include a file
 				 * called content-search.php and that will be used instead.
 				 */
 				get_template_part( 'content', 'search' );
-				?>
 
-			<?php endwhile; ?>
+			// End the loop.
+			endwhile;
 
-			<?php
-				the_pagination( array(
-					'prev_text'          => __( 'Previous page', 'twentyfifteen' ),
-					'next_text'          => __( 'Next page', 'twentyfifteen' ),
-					'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
-				) );
-			?>
+			// Previous/next page navigation.
+			the_pagination( array(
+				'prev_text'          => __( 'Previous page', 'twentyfifteen' ),
+				'next_text'          => __( 'Next page', 'twentyfifteen' ),
+				'before_page_number' => '<span class="meta-nav screen-reader-text">' . __( 'Page', 'twentyfifteen' ) . ' </span>',
+			) );
 
-		<?php else : ?>
+		// If no content, include the "No posts found" template.
+		else :
+			get_template_part( 'content', 'none' );
 
-			<?php get_template_part( 'content', 'none' ); ?>
-
-		<?php endif; ?>
+		endif;
+		?>
 
 		</main><!-- .site-main -->
 	</section><!-- .content-area -->
diff --git a/wp-content/themes/twentyfifteen/sidebar.php b/wp-content/themes/twentyfifteen/sidebar.php
index a8a40d5e36..02308efc37 100644
--- a/wp-content/themes/twentyfifteen/sidebar.php
+++ b/wp-content/themes/twentyfifteen/sidebar.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The sidebar containing the main widget area.
+ * The sidebar containing the main widget area
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -9,34 +9,39 @@
 
 if ( has_nav_menu( 'primary' ) || has_nav_menu( 'social' ) || is_active_sidebar( 'sidebar-1' )  ) : ?>
 	<div id="secondary" class="secondary">
+
 		<?php if ( has_nav_menu( 'primary' ) ) : ?>
-		<nav id="site-navigation" class="main-navigation" role="navigation">
-			<?php
-				wp_nav_menu( array(
-					'menu_class'     => 'nav-menu',
-					'theme_location' => 'primary',
-				) );
-			?>
-		</nav><!-- .main-navigation -->
+			<nav id="site-navigation" class="main-navigation" role="navigation">
+				<?php
+					// Primary navigation menu.
+					wp_nav_menu( array(
+						'menu_class'     => 'nav-menu',
+						'theme_location' => 'primary',
+					) );
+				?>
+			</nav><!-- .main-navigation -->
 		<?php endif; ?>
 
 		<?php if ( has_nav_menu( 'social' ) ) : ?>
-		<nav id="social-navigation" class="social-navigation" role="navigation">
-			<?php
-				wp_nav_menu( array(
-					'theme_location' => 'social',
-					'depth'          => 1,
-					'link_before'    => '<span class="screen-reader-text">',
-					'link_after'     => '</span>',
-				) );
-			?>
-		</nav><!-- .social-navigation -->
+			<nav id="social-navigation" class="social-navigation" role="navigation">
+				<?php
+					// Social links navigation menu.
+					wp_nav_menu( array(
+						'theme_location' => 'social',
+						'depth'          => 1,
+						'link_before'    => '<span class="screen-reader-text">',
+						'link_after'     => '</span>',
+					) );
+				?>
+			</nav><!-- .social-navigation -->
 		<?php endif; ?>
 
 		<?php if ( is_active_sidebar( 'sidebar-1' ) ) : ?>
-		<div id="widget-area" class="widget-area" role="complementary">
-			<?php dynamic_sidebar( 'sidebar-1' ); ?>
-		</div><!-- .widget-area -->
+			<div id="widget-area" class="widget-area" role="complementary">
+				<?php dynamic_sidebar( 'sidebar-1' ); ?>
+			</div><!-- .widget-area -->
 		<?php endif; ?>
+
 	</div><!-- .secondary -->
-<?php endif; ?>
\ No newline at end of file
+
+<?php endif; ?>
diff --git a/wp-content/themes/twentyfifteen/single.php b/wp-content/themes/twentyfifteen/single.php
index f57d62b468..be4a8c3d7c 100644
--- a/wp-content/themes/twentyfifteen/single.php
+++ b/wp-content/themes/twentyfifteen/single.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * The template for displaying all single posts and attachments.
+ * The template for displaying all single posts and attachments
  *
  * @package WordPress
  * @subpackage Twenty_Fifteen
@@ -12,27 +12,33 @@ get_header(); ?>
 	<div id="primary" class="content-area">
 		<main id="main" class="site-main" role="main">
 
-		<?php while ( have_posts() ) : the_post(); ?>
+		<?php
+		// Start the loop.
+		while ( have_posts() ) : the_post();
 
-			<?php get_template_part( 'content', get_post_format() ); ?>
+			/*
+			 * Include the post format-specific template for the content. If you want to
+			 * use this in a child theme, then include a file called called content-___.php
+			 * (where ___ is the post format) and that will be used instead.
+			 */
+			get_template_part( 'content', get_post_format() );
 
-			<?php
-				// If comments are open or we have at least one comment, load up the comment template
-				if ( comments_open() || get_comments_number() ) :
-					comments_template();
-				endif;
-			?>
+			// If comments are open or we have at least one comment, load up the comment template.
+			if ( comments_open() || get_comments_number() ) :
+				comments_template();
+			endif;
 
-			<?php
-				the_post_navigation( array(
-					'next_text' => _x( '<span class="meta-nav">Next <span class="screen-reader-text">post:</span></span><span class="post-title">%title</span>', 'Next post link', 'twentyfifteen' ),
-					'prev_text' => _x( '<span class="meta-nav">Previous <span class="screen-reader-text">post:</span></span><span class="post-title">%title</span>', 'Previous post link', 'twentyfifteen' )
-				) );
-			?>
+			// Previous/next post navigation.
+			the_post_navigation( array(
+				'next_text' => _x( '<span class="meta-nav">Next <span class="screen-reader-text">post:</span></span><span class="post-title">%title</span>', 'Next post link', 'twentyfifteen' ),
+				'prev_text' => _x( '<span class="meta-nav">Previous <span class="screen-reader-text">post:</span></span><span class="post-title">%title</span>', 'Previous post link', 'twentyfifteen' )
+			) );
 
-		<?php endwhile; // end of the loop. ?>
+		// End the loop.
+		endwhile;
+		?>
 
 		</main><!-- .site-main -->
 	</div><!-- .content-area -->
 
-<?php get_footer(); ?>
\ No newline at end of file
+<?php get_footer(); ?>
diff --git a/wp-content/themes/twentyfifteen/style.css b/wp-content/themes/twentyfifteen/style.css
index e312982652..b1057fec13 100644
--- a/wp-content/themes/twentyfifteen/style.css
+++ b/wp-content/themes/twentyfifteen/style.css
@@ -1,8 +1,8 @@
 /*
 Theme Name: Twenty Fifteen
-Theme URI: http://wordpress.org/themes/twentyfifteen
+Theme URI: https://wordpress.org/themes/twentyfifteen
 Author: the WordPress team
-Author URI: http://wordpress.org/
+Author URI: https://wordpress.org/
 Description: Our 2015 default theme is clean, blog-focused, and designed for clarity. Twenty Fifteen's simple, straightforward typography is readable on a wide variety of screen sizes, and suitable for multiple languages. We designed it using a mobile-first approach, meaning your content takes center-stage, regardless of whether your visitors arrive by smartphone, tablet, laptop, or desktop computer.
 Version: 0.1
 License: GNU General Public License v2 or later
@@ -2593,10 +2593,11 @@ span > video {
  * 15.0 Media Queries
  */
 
-/* Does the same thing as <meta name="viewport" content="width=device-width">,
+/*
+ * Does the same thing as <meta name="viewport" content="width=device-width">,
  * but in the future W3C standard way. -ms- prefix is required for IE10+ to
  * render responsive styling in Windows 8 "snapped" views; IE10+ does not honor
- * the meta tag. See http://core.trac.wordpress.org/ticket/25888.
+ * the meta tag. See https://core.trac.wordpress.org/ticket/25888.
  */
 @-ms-viewport {
 	width: device-width;