Apply suggestions from code review

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/math/base/special/acovercos/benchmark/benchmark.native.js

@@ -45,7 +45,7 @@ bench( pkg+'::native', opts, function benchmark( b ) {
 
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		x = ( randu()*-2.0 );
+		x = ( -2.0*randu() ) + 0.0;
 		y = acovercos( x );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );