We actually only need to skip VLSpec validation but not Vg.

Also improve the suffix check.  (This should be faster than the old condition and regexp)

cc: @arvind

examples/examples.test.ts

@@ -48,21 +48,23 @@ describe('Examples', function() {
   const examples = fs.readdirSync('examples/specs');
 
   examples.forEach(function(example: string) {
-    if (
-      path.extname(example) !== '.json' ||
-      // Do not validate overlay example until we have redesigned it
-      example.indexOf('overlay') >= 0 ||
-      // Also ignore box-plot examples until we support selections
-      example.indexOf('box-plot') >= 0 ||
-      // Also ignore all examples with "_future" suffix
-      example.lastIndexOf('_future.vl.json') === example.length - suffixLength
-      ) {
+    if (path.extname(example) !== '.json') {
       return;
     }
     const jsonSpec = JSON.parse(fs.readFileSync('examples/specs/' + example));
 
     describe(example, function() {
       it('should be valid vega-lite with proper $schema', function() {
+        if (
+          // Do not validate overlay example until we have redesigned it
+          example.indexOf('overlay') >= 0 ||
+          // Also ignore box-plot examples until we support selections
+          example.indexOf('box-plot') >= 0 ||
+          // Also ignore all examples with "_future" suffix
+          example.lastIndexOf('_future.vl.json', example.length - suffixLength) >= 0
+          ) {
+          return;
+        }
         validateVL(jsonSpec);
       });