Fix wording in copy-sync-dir.test.js (#1031)

Author: dtslvr

lib/copy/__tests__/copy-sync-dir.test.js

@@ -120,7 +120,7 @@ describe('+ copySync() / dir', () => {
       assert(!fs.existsSync(destDir))
     })
 
-    it('should should apply filter recursively', () => {
+    it('should apply filter recursively', () => {
       const FILES = 2
       // Don't match anything that ends with a digit higher than 0:
       const filter = s => /(0|\D)$/i.test(s)