Fixed invalid test.

Author: neogeek

package.json

@@ -21,7 +21,7 @@
   },
   "scripts": {
     "test": "npm run lint && doxdox index.js --layout test/fixtures/template.hbs | diff test/fixtures/generated.html -",
-    "test:docs": "doxdox index.js --layout index.js | diff DOCUMENTATION.md -",
+    "test:docs": "doxdox index.js --layout markdown | diff DOCUMENTATION.md -",
     "lint": "eslint .",
     "fixtures": "doxdox index.js --layout test/fixtures/template.hbs --output test/fixtures/generated.html",
     "docs": "doxdox index.js --layout markdown --output DOCUMENTATION.md"