bench: refactor to use string interpolation in array/base/cuany

PR-URL: #8853
Ref: #8647

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

Author: Amansingh0807

lib/node_modules/@stdlib/array/base/cuany/benchmark/benchmark.length.js

@@ -24,6 +24,7 @@ var bench = require( '@stdlib/bench' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var isArray = require( '@stdlib/assert/is-array' );
 var filled = require( '@stdlib/array/base/filled' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var cuany = require( './../lib' );
 
@@ -88,7 +89,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+':len='+len, f );
+		bench( format( '%s:len=%d', pkg, len ), f );
 	}
 }