Fix typo

Author: lqez

nirum/deserialize.py

@@ -201,7 +201,7 @@ def deserialize_meta(cls, data):
           hasattr(cls, '__nirum_inner_type__')):
         d = deserialize_unboxed_type(cls, data)
     elif type(cls) is typing.TupleMeta:
-        # typing.Tuple dosen't have either `__origin__` and `__args__`
+        # typing.Tuple doesn't have either `__origin__` and `__args__`
         # so it have to be handled special case.
         d = deserialize_tuple_type(cls, data)
     elif is_support_abstract_type(cls):

nirum/rpc.py

@@ -138,7 +138,7 @@ def rpc(self, request, args):
             return self.error(
                 400,
                 request,
-                message="Service dosen't have procedure named '{}'.".format(
+                message="Service doesn't have procedure named '{}'.".format(
                     request_method
                 )
             )

nirum/transport.py

@@ -22,7 +22,7 @@ def call(self,
                             call.  See also `Nirum's serialization format
                             docs <serialization-format>`_.
         :type method_name: :class:`str`
-        :param paylaod: A mapping of parameter names to serialized argument
+        :param payload: A mapping of parameter names to serialized argument
                         values.  The keys have to be normalized behind names
                         of parameters.  The values have to be serialized
                         argument values.  See also `Nirum's serialization