update python-nextgen samples

Author: wing328

samples/client/echo_api/python-nextgen/openapi_client/api_client.py

@@ -64,7 +64,7 @@ class ApiClient(object):
 
     def __init__(self, configuration=None, header_name=None, header_value=None,
                  cookie=None, pool_threads=1):
-        # use default configuraiton if none is provided
+        # use default configuration if none is provided
         if configuration is None:
             configuration = Configuration.get_default()
         self.configuration = configuration

samples/openapi3/client/petstore/python-nextgen-aiohttp/petstore_api/api_client.py

@@ -63,7 +63,7 @@ class ApiClient(object):
 
     def __init__(self, configuration=None, header_name=None, header_value=None,
                  cookie=None, pool_threads=1):
-        # use default configuraiton if none is provided
+        # use default configuration if none is provided
         if configuration is None:
             configuration = Configuration.get_default()
         self.configuration = configuration

samples/openapi3/client/petstore/python-nextgen/petstore_api/api_client.py

@@ -63,7 +63,7 @@ class ApiClient(object):
 
     def __init__(self, configuration=None, header_name=None, header_value=None,
                  cookie=None, pool_threads=1):
-        # use default configuraiton if none is provided
+        # use default configuration if none is provided
         if configuration is None:
             configuration = Configuration.get_default()
         self.configuration = configuration