docs: update example

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

Author: kgryte

lib/node_modules/@stdlib/assert/is-enumerable-property/examples/index.js

@@ -22,7 +22,10 @@
 
 var isEnumerableProperty = require( './../lib' );
 
-var bool = isEnumerableProperty({ 'a': 'b' }, 'a');
+var obj = {
+	'a': 'b'
+};
+var bool = isEnumerableProperty( obj, 'a' );
 console.log( bool );
 // => true
 
@@ -50,10 +53,16 @@ bool = isEnumerableProperty( void 0, 'a' );
 console.log( bool );
 // => false
 
-bool = isEnumerableProperty({ 'null': false }, null);
+obj = {
+	'null': false
+};
+bool = isEnumerableProperty( obj, null );
 console.log( bool );
 // => true
 
-bool = isEnumerableProperty({ '[object Object]': false }, {});
+obj = {
+	'[object Object]': false
+};
+bool = isEnumerableProperty( obj, {} );
 console.log( bool );
 // => true