[Python] 5094 followup - Reduce redundancy in docs (#5161)

* Reduce redundancy in python docs

This is a followup to PR #5094, which had a few unresolved comments at
merge time. This reduces the amount of redundant lines in the api
example doc templates, and ensures that referenced Configuration objects
are actually instantiated.

* Regenerate samples

samples/client/petstore/python-asyncio/docs/FakeApi.md

@@ -482,6 +482,7 @@ configuration.password = 'YOUR_PASSWORD'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class

samples/client/petstore/python-asyncio/docs/FakeClassnameTags123Api.md

@@ -31,6 +31,7 @@ configuration.api_key['api_key_query'] = 'YOUR_API_KEY'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class

samples/client/petstore/python-asyncio/docs/PetApi.md

@@ -35,6 +35,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -95,6 +96,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -159,6 +161,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -222,6 +225,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -287,6 +291,7 @@ configuration.api_key['api_key'] = 'YOUR_API_KEY'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -349,6 +354,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -411,6 +417,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -474,6 +481,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -538,6 +546,7 @@ configuration.access_token = 'YOUR_ACCESS_TOKEN'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class

samples/client/petstore/python-asyncio/docs/StoreApi.md

@@ -90,6 +90,7 @@ configuration.api_key['api_key'] = 'YOUR_API_KEY'
 
 # Defining host is optional and default to http://petstore.swagger.io:80/v2
 configuration.host = "http://petstore.swagger.io:80/v2"
+
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class