diff --git a/wp-includes/media.php b/wp-includes/media.php
index c45ef65c88..4003a41bbe 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -1397,33 +1397,35 @@ function wp_oembed_add_provider( $format, $provider, $regex = false ) {
 }
 
 /**
+ * Generate HTML for the editor media buttons (image, video, audio).
  *
+ * @since 3.1.0
  *
- *
+ * @return string HTML
  */
-function get_media_buttons(){
+function get_media_buttons() {
 	$do_image = $do_audio = $do_video = true;
 	if ( is_multisite() ) {
 		$media_buttons = get_site_option( 'mu_media_buttons' );
-		if ( empty($media_buttons['image']) )
+		if ( empty( $media_buttons['image'] ) )
 			$do_image = false;
-		if ( empty($media_buttons['audio']) )
+		if ( empty( $media_buttons['audio'] ) )
 			$do_audio = false;
-		if ( empty($media_buttons['video']) )
+		if ( empty( $media_buttons['video'] ) )
 			$do_video = false;
 	}
 	$out = '';
 
 	if ( $do_image )
-		$out .= _media_button(__('Add an Image'), 'images/media-button-image.gif?ver=20100531', 'image');
+		$out .= _media_button( __( 'Add an Image' ), 'images/media-button-image.gif?ver=20100531', 'image' );
 	if ( $do_video )
-		$out .= _media_button(__('Add Video'), 'images/media-button-video.gif?ver=20100531', 'video');
+		$out .= _media_button( __( 'Add Video' ), 'images/media-button-video.gif?ver=20100531', 'video' );
 	if ( $do_audio )
-		$out .= _media_button(__('Add Audio'), 'images/media-button-music.gif?ver=20100531', 'audio');
+		$out .= _media_button( __( 'Add Audio' ), 'images/media-button-music.gif?ver=20100531', 'audio' );
 
-	$out .= _media_button(__('Add Media'), 'images/media-button-other.gif?ver=20100531', 'media');
+	$out .= _media_button( __( 'Add Media' ), 'images/media-button-other.gif?ver=20100531', 'media' );
 
-	$context = apply_filters('media_buttons_context', __('Upload/Insert %s'));
+	$context = apply_filters( 'media_buttons_context', __( 'Upload/Insert %s' ) );
 
 	return sprintf($context, $out);
 
@@ -1440,18 +1442,29 @@ function media_buttons() {
 }
 add_action( 'media_buttons', 'media_buttons' );
 
-function _media_button($title, $icon, $type) {
-	return "<a href='" . esc_url( get_upload_iframe_src($type) ) . "' id='add_$type' class='thickbox' title='$title'><img src='" . esc_url( admin_url( $icon ) ) . "' alt='$title' /></a>";
+/**
+ * {@internal Missing Short Description}}
+ *
+ * @since unknown
+ * @access private
+ */
+function _media_button( $title, $icon, $type ) {
+	return "<a href='" . esc_url( get_upload_iframe_src( $type ) ) . "' id='add_$type' class='thickbox' title='$title'><img src='" . esc_url( admin_url( $icon ) ) . "' alt='$title' /></a>";
 }
 
-function get_upload_iframe_src($type) {
+/**
+ * {@internal Missing Short Description}}
+ *
+ * @since unknown
+ */
+function get_upload_iframe_src( $type ) {
 	global $post_ID, $temp_ID;
-	$uploading_iframe_ID = (int) (0 == $post_ID ? $temp_ID : $post_ID);
-	$upload_iframe_src = add_query_arg('post_id', $uploading_iframe_ID, 'media-upload.php');
+	$uploading_iframe_ID = (int) ( 0 == $post_ID ? $temp_ID : $post_ID );
+	$upload_iframe_src = add_query_arg( 'post_id', $uploading_iframe_ID, 'media-upload.php' );
 
 	if ( 'media' != $type )
-		$upload_iframe_src = add_query_arg('type', $type, $upload_iframe_src);
-	$upload_iframe_src = apply_filters($type . '_upload_iframe_src', $upload_iframe_src);
+		$upload_iframe_src = add_query_arg( 'type', $type, $upload_iframe_src );
+	$upload_iframe_src = apply_filters( $type . '_upload_iframe_src', $upload_iframe_src );
 
-	return add_query_arg('TB_iframe', true, $upload_iframe_src);
+	return add_query_arg( 'TB_iframe', true, $upload_iframe_src );
 }