Fix another batch of spelling typos (#13915)

* Fix typos

* Remove repeated words

* Minor grammar fixes

samples/server/petstore/python-aiohttp-srclayout/README.md

@@ -38,7 +38,7 @@ pytest
 
 ## Prevent file overriding
 
-After first generation, add edited files to _.openapi-generator-ignore_ to prevent generator to overwrite them. Typically:
+After first generation, add edited files to _.openapi-generator-ignore_ to prevent generator from overwriting them. Typically:
 ```
 server/controllers/*
 test/*

samples/server/petstore/python-aiohttp-srclayout/src/openapi_server/controllers/store_controller.py

@@ -30,7 +30,7 @@ async def get_inventory(request: web.Request, ) -> web.Response:
 async def get_order_by_id(request: web.Request, order_id) -> web.Response:
     """Find purchase order by ID
 
-    For valid response try integer IDs with value <= 5 or > 10. Other values will generated exceptions
+    For valid response try integer IDs with value <= 5 or > 10. Other values will generate exceptions
 
     :param order_id: ID of pet that needs to be fetched
     :type order_id: int

samples/server/petstore/python-aiohttp-srclayout/src/openapi_server/openapi/openapi.yaml

@@ -359,7 +359,7 @@ paths:
       x-openapi-router-controller: openapi_server.controllers.store_controller
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
-        values will generated exceptions
+        values will generate exceptions
       operationId: get_order_by_id
       parameters:
       - description: ID of pet that needs to be fetched

samples/server/petstore/python-aiohttp-srclayout/tests/test_pet_controller.py

@@ -9,7 +9,7 @@ from openapi_server.models.api_response import ApiResponse
 from openapi_server.models.pet import Pet
 
 
-@pytest.mark.skip("Connexion does not support multiple consummes. See https://github.com/zalando/connexion/pull/760")
+@pytest.mark.skip("Connexion does not support multiple consumes. See https://github.com/zalando/connexion/pull/760")
 async def test_add_pet(client):
     """Test case for add_pet
 
@@ -117,7 +117,7 @@ async def test_get_pet_by_id(client):
     assert response.status == 200, 'Response body is : ' + (await response.read()).decode('utf-8')
 
 
-@pytest.mark.skip("Connexion does not support multiple consummes. See https://github.com/zalando/connexion/pull/760")
+@pytest.mark.skip("Connexion does not support multiple consumes. See https://github.com/zalando/connexion/pull/760")
 async def test_update_pet(client):
     """Test case for update_pet