switch singleton example to have a bug in singleton implementation

examples/buggy_script_2.py

@@ -2,27 +2,26 @@
 import fire
 
 """
-Run With: with `wolverine examples/buggy_script_2.py "return_2"`
+Run With: with `python wolverine.py examples/buggy_script_2.py`
 Purpose: Fix singleton code bug in Python
 """
 
 class SingletonClass(object):
     def __new__(cls):
-    if not hasattr(cls, 'instance'):
         cls.instance = super(SingletonClass, cls).__new__(cls)
         return cls.instance
 
-def return_2():
+def check_singleton_works():
     """
-  Always returns 2
+    check that singleton pattern is working
     """
     singleton = SingletonClass()
     new_singleton = SingletonClass()
     singleton.a = 1
     new_singleton.a = 2
-  would_be_2 = (singleton.a + singleton.a)
+    should_be_4 = (singleton.a + new_singleton.a)
-  assert would_be_2 == 2
+    assert should_be_4 == 4
-  return would_be_2
 
 if __name__=="__main__":
-  fire.Fire()
+    fire.Fire(check_singleton_works)
+