bench: refactor to use string interpolation in array/base/broadcast-array

PR-URL: #8807
Ref: #8647
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: ksuraev

lib/node_modules/@stdlib/array/base/broadcast-array/benchmark/benchmark.dimensions.js

@@ -24,6 +24,7 @@ var bench = require( '@stdlib/bench' );
 var isArray = require( '@stdlib/assert/is-array' );
 var isEven = require( '@stdlib/math/base/assert/is-even' );
 var zerosnd = require( '@stdlib/array/base/zerosnd' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var broadcastArray = require( './../lib' );
 
@@ -109,7 +110,7 @@ function main() {
 
 	for ( i = min; i <= max; i++ ) {
 		f = createBenchmark( i );
-		bench( pkg+':dimensions='+i, f );
+		bench( format( '%s:dimensions=%d', pkg, i ), f );
 	}
 }