bench: refactor to use string interpolation in stats/base/dists/levy/mean

PR-URL: #9896
Ref: #8647
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: daksha607

lib/node_modules/@stdlib/stats/base/dists/levy/mean/benchmark/benchmark.native.js

@@ -22,6 +22,7 @@
 
 var resolve = require( 'path' ).resolve;
 var bench = require( '@stdlib/bench' );
+var format = require( '@stdlib/string/format' );
 var Float64Array = require( '@stdlib/array/float64' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var uniform = require( '@stdlib/random/base/uniform' );
@@ -40,7 +41,7 @@ var opts = {
 
 // MAIN //
 
-bench( pkg+'::native', opts, function benchmark( b ) {
+bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
 	var len;
 	var mu;
 	var c;