diff --git a/lib/common/options.js b/lib/common/options.js
index 8f676ae747..f34b4367d6 100755
--- a/lib/common/options.js
+++ b/lib/common/options.js
@@ -151,9 +151,9 @@ Options.defaults = {
       useShortDoctype: true
     },
     html: {
-      useRouteName: false,  // if set ture, will use the last route path as html file name, but replace route `/` with `/index`.
-      fileName: 'index',    // the html template file name, default 'index'.
-      extension: 'html'     // the html template extension type, default `html`. also can be set 'php' or jsp' or others.
+      useRouteName: false, // if set ture, will use the last route path as html file name, but replace route `/` with `/index`.
+      fileName: 'index', // the html template file name, default 'index'.
+      extension: 'html' // the html template extension type, default `html`. also can be set 'php' or jsp' or others.
     }
   },
   env: {},