chore: fix JavaScript lint errors

PR-URL: #11533
Reviewed-by: Athan Reines <kgryte@gmail.com>
Closes: #11517

Author: bhumikasudarshani-cmd

lib/node_modules/@stdlib/utils/async/map-values/examples/index.js

@@ -20,6 +20,7 @@
 
 var resolve = require( 'path' ).resolve;
 var stats = require( 'fs' ).stat;
+var format = require( '@stdlib/string/format' );
 var mapValuesAsync = require( './../lib' );
 
 var files = {
@@ -32,7 +33,7 @@ function getStats( file, next ) {
 
 	function onStats( error, data ) {
 		if ( error ) {
-			error = new Error( 'unable to retrieve stats: '+file );
+			error = new Error( format( 'unable to retrieve stats: %s', file ) );
 			return next( error );
 		}
 		next( null, data );