Output the actually generated file

And not "SUMMARY.md" statically, although another file was generated

Author: abeggchr

lib/summary/index.js

@@ -192,7 +192,7 @@ function isSkiped(key, skip) {
 // Write to file encoded with utf-8
 function writeFile(fileName, data) {
  fs.writeFile(fileName, data, 'utf-8', function() {
- console.log(color.green("Finished, generate a SUMMARY.md successfully."));
+ console.log(color.green("Finished, generated '"+fileName+"' successfully."));
  })
 }