fixes #325 - fixed trailing spaces problem (#326)

Fixes issue #325, app.json created by loklakinit no
more contains trailing spaces and has eof line.

Author: djmgit

bin/loklakinit.py

@@ -227,7 +227,7 @@ def sigint_handler(signum, frame):
   index_html.close()
 
   app_json_file = open("app.json", 'w')
-  app_json_file.write(json.dumps(app_json, indent=2))
+  app_json_file.write('{}\n'.format(json.dumps(app_json, indent=2, separators=(',', ': '))))
   app_json_file.close()
 
   get_started_md = open("getStarted.md", 'w')