fix: resolve 3 lint errors - var order, empty line, use stdlib abs

Author: Amansingh0807

lib/node_modules/@stdlib/math/base/special/roundnf/test/test.js

@@ -95,10 +95,11 @@ tape( 'the function supports rounding to nearest hundred (n=2)', function test(
 });
 
 tape( 'the function supports rounding to nearest thousand (n=3)', function test( t ) {
-	var v = roundnf( 12368.0, 3 );
 	var expected = float64ToFloat32( 12000.0 );
+	var v = roundnf( 12368.0, 3 );
+
 	// Due to float32 precision, allow small error (< 1.0)
-	t.ok( Math.abs( v - expected ) < 1.0, 'returns expected value (within float32 precision)' );
+	t.ok( abs( v - expected ) < 1.0, 'returns expected value (within float32 precision)' );
 	t.end();
 });