Fix wrong blacklist behaviour

library/blacklist

@@ -90,7 +90,7 @@ class Blacklist(object):
 
     def add_module(self):
         f = open(self.filename, 'a')
-        f.write('blacklist %s' % self.module)
+        f.write('blacklist %s\n' % self.module)
 
 
 def main():
@@ -113,11 +113,11 @@ def main():
 
     if blacklist.module_listed():
         if args['state'] == 'absent':
-            blacklist.add_module()
+            blacklist.remove_module()
             args['changed'] = True
     else:
         if args['state'] == 'present':
-            blacklist.remove_module()
+            blacklist.add_module()
             args['changed'] = True
 
     module.exit_json(**args)