Index: wp-includes/query.php
===================================================================
--- wp-includes/query.php	(revision 31955)
+++ wp-includes/query.php	(working copy)
@@ -721,8 +721,14 @@
  */
 function is_main_query() {
 	if ( 'pre_get_posts' === current_filter() ) {
-		$message = sprintf( __( 'In <code>%1$s</code>, use the <code>%2$s</code> method, not the <code>%3$s</code> function. See %4$s.' ),
-			'pre_get_posts', 'WP_Query::is_main_query()', 'is_main_query()', __( 'http://codex.wordpress.org/Function_Reference/is_main_query' ) );
+		$message = sprintf(
+			/* translators: 1: pre_get_posts 2: WP_Query::is_main_query() 3: is_main_query() 4: link to codex is_main_query() page. */
+			__( 'In %1$s, use the %2$s method, not the %3$s function. See %4$s.' ),
+			'<code>pre_get_posts</code>',
+			'<code>WP_Query::is_main_query()</code>',
+			'<code>is_main_query()</code>',
+			__( 'http://codex.wordpress.org/Function_Reference/is_main_query' )
+		);
 		_doing_it_wrong( __FUNCTION__, $message, '3.7' );
 	}