Twenty Fifteen: Add missing singular placeholder in comments.php.

Uses the recommended pattern for better compatibility with languages that use the singular form for other numbers. Also adds translator comments.

Props bplv, xkon.
See #39660.
Built from https://develop.svn.wordpress.org/trunk@41761


git-svn-id: http://core.svn.wordpress.org/trunk@41595 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyfifteen/comments.php

@@ -25,8 +25,24 @@ if ( post_password_required() ) {
 	<?php if ( have_comments() ) : ?>
 		<h2 class="comments-title">
 			<?php
-				printf( _nx( 'One thought on &ldquo;%2$s&rdquo;', '%1$s thoughts on &ldquo;%2$s&rdquo;', get_comments_number(), 'comments title', 'twentyfifteen' ),
-					number_format_i18n( get_comments_number() ), get_the_title() );
+				$comments_number = get_comments_number();
+				if ( '1' === $comments_number ) {
+					/* translators: %s: post title */
+					printf( _x( 'One thought on &ldquo;%s&rdquo;', 'comments title', 'twentyfifteen' ), get_the_title() );
+				} else {
+					printf(
+						/* translators: 1: number of comments, 2: post title */
+						_nx(
+							'%1$s thought on &ldquo;%2$s&rdquo;',
+							'%1$s thoughts on &ldquo;%2$s&rdquo;',
+							$comments_number,
+							'comments title',
+							'twentyfifteen'
+						),
+						number_format_i18n( $comments_number ),
+						get_the_title()
+					);
+				}
 			?>
 		</h2>
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41760';
+$wp_version = '4.9-alpha-41761';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.