bench: refactor to use string interpolation in stats/base/dists/rayleigh/stdev

PR-URL: #9788
Ref: #8647

Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: bhargava-d16

lib/node_modules/@stdlib/stats/base/dists/rayleigh/stdev/benchmark/benchmark.native.js

@@ -28,6 +28,7 @@ var uniform = require( '@stdlib/random/base/uniform' );
 var EPS = require( '@stdlib/constants/float64/eps' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 
 
@@ -41,7 +42,7 @@ var opts = {
 
 // MAIN //
 
-bench( pkg+'::native', opts, function benchmark( b ) {
+bench( format( '%s::native', pkg ), opts, function benchmark( b ) {
 	var sigma;
 	var len;
 	var y;