Sync and fix the CompatUnpickler docstring.

theano/misc/pkl_utils.py

@@ -124,12 +124,15 @@ if PY3:
         Examples
         --------
 
+        ::
+
             with open(fname, 'rb') as fp:
                 if PY3:
                     u = CompatUnpickler(fp, encoding="latin1")
                 else:
                     u = CompatUnpickler(fp)
                 mat = u.load()
+
         """
         pass
 
@@ -145,13 +148,15 @@ else:
         Examples
         --------
 
+        ::
+
             with open(fname, 'rb') as fp:
                 if PY3:
                     u = CompatUnpickler(fp, encoding="latin1")
                 else:
                     u = CompatUnpickler(fp)
-
                 mat = u.load()
+
         """
         pass