remove misleading options example

Author: chrisbreiding

README.md

@@ -29,10 +29,7 @@ Pass in options as the second argument to `browserify`:
 ```javascript
 module.exports = (on, config) => {
   const options = {
-    extensions: [],
-    watchOptions: {},
-    transforms: [],
-    onBundle () {},
+    // options here
   }
 
   on('file:preprocessor', browserify(config, options))

index.js

@@ -67,7 +67,7 @@ const preprocessor = (config, userOptions = {}) => {
   //
   // this function will get called for the support file when a project is loaded
   // (if the support file is not disabled)
-  // it will also get calledfor a spec file when that spec is requested by
+  // it will also get called for a spec file when that spec is requested by
   // the Cypress runner
   //
   // when running in the GUI, it will likely get called multiple times