bench: refactor to use string interpolation in lapack/base/dgttrf

PR-URL: #10096
Ref: #8647

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

Author: prajjwalbajpai

lib/node_modules/@stdlib/lapack/base/dgttrf/benchmark/benchmark.js

@@ -25,6 +25,7 @@ var uniform = require( '@stdlib/random/array/uniform' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Int32Array = require( '@stdlib/array/int32' );
 var Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var dgttrf = require( './../lib/dgttrf.js' );
 
@@ -100,7 +101,7 @@ 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 );
 	}
 }
 

lib/node_modules/@stdlib/lapack/base/dgttrf/benchmark/benchmark.ndarray.js

@@ -25,6 +25,7 @@ var uniform = require( '@stdlib/random/array/uniform' );
 var pow = require( '@stdlib/math/base/special/pow' );
 var Int32Array = require( '@stdlib/array/int32' );
 var Float64Array = require( '@stdlib/array/float64' );
+var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
 var dgttrf = require( './../lib/ndarray.js' );
 
@@ -100,7 +101,7 @@ function main() {
 	for ( i = min; i <= max; i++ ) {
 		len = pow( 10, i );
 		f = createBenchmark( len );
-		bench( pkg+':ndarray:len='+len, f );
+		bench( format( '%s:ndarray:len=%d', pkg, len ), f );
 	}
 }