Fix typo in examples/eventlet and formatting.

examples/eventlet/README.rst

@@ -35,13 +35,13 @@ of the response body::
     >>> urlopen.delay("http://www.google.com/").get()
     9980
 
-To open several URLs at once you can do:
+To open several URLs at once you can do::
 
     $ cd examples/eventlet
     $ python
     >>> from tasks import urlopen
     >>> from celery import group
-    >>> result = gruop(urlopen.s(url)
+    >>> result = group(urlopen.s(url)
     ...                     for url in LIST_OF_URLS).apply_async()
     >>> for incoming_result in result.iter_native():
     ...     print(incoming_result, )