fixed typo in comment

Author: James Yu

elasticsearch/client/__init__.py

@@ -65,7 +65,7 @@ def __init__(self, hosts=None, transport_class=Transport, **kwargs):
  :arg hosts: list of nodes we should connect to. Node should be a
  dictionary ({"host": "localhost", "port": 9200}), the entire dictionary
  will be passed to the :class:`~elasticsearch.Connection` class as
- kwargs, or a string in the format ot ``host[:port]`` which will be
+ kwargs, or a string in the format of ``host[:port]`` which will be
  translated to a dictionary automatically. If no value is given the
  :class:`~elasticsearch.Connection` class defaults will be used.