Escape the captions in the gallery with wptexturize() instead of wp_specialchars(), props Denis-de-Bernardy, fixes #8763

git-svn-id: http://svn.automattic.com/wordpress/trunk@11336 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/media.php

@@ -684,7 +684,7 @@ function gallery_shortcode($attr) {
 		if ( $captiontag && trim($attachment->post_excerpt) ) {
 			$output .= "
 				<{$captiontag} class='gallery-caption'>
-				" . wp_specialchars($attachment->post_excerpt) . "
+				" . wptexturize($attachment->post_excerpt) . "
 				</{$captiontag}>";
 		}
 		$output .= "</{$itemtag}>";