Merge pull request #3845 from EledenGreen/patch-13

8c-e: updated links, sentence

Author: vejol

src/content/8/en/part8d.md

@@ -114,7 +114,7 @@ Use of the effect hook is necessary to avoid an endless rendering loop.
 
 Let's also add a button which enables a logged-in user to log out. The button's onClick handler sets the *token* state to null, removes the token from local storage and resets the cache of the Apollo client. The last step is [important](https://www.apollographql.com/docs/react/networking/authentication/#reset-store-on-logout), because some queries might have fetched data to cache, which only logged-in users should have access to.
 
-We can reset the cache using the [resetStore](https://www.apollographql.com/docs/react/api/core/ApolloClient/#ApolloClient.resetStore) method of an Apollo *client* object.
+We can reset the cache using the [resetStore](https://www.apollographql.com/docs/react/api/core/ApolloClient#resetstore) method of an Apollo *client* object.
 The client can be accessed with the [useApolloClient](https://www.apollographql.com/docs/react/api/react/hooks#useapolloclient) hook:
 
 ```js
@@ -272,7 +272,7 @@ query ALLPERSONS in the cache by adding the new person to the cached data.
 
 In some situations, the only sensible way to keep the cache up to date is using the *update* callback.
 
-When necessary, it is possible to disable cache for the whole application or [single queries](https://www.apollographql.com/docs/react/api/react/hooks/#options) by setting the field managing the use of cache, [fetchPolicy](https://www.apollographql.com/docs/react/data/queries/#configuring-fetch-logic) as <em>no-cache</em>.
+When necessary, it is possible to disable cache for the whole application or [single queries](https://www.apollographql.com/docs/react/api/react/hooks/#options) by setting the field managing the use of cache, [fetchPolicy](https://www.apollographql.com/docs/react/data/queries#setting-a-fetch-policy) as <em>no-cache</em>.
 
 Be diligent with the cache. Old data in the cache can cause hard-to-find bugs. As we know, keeping the cache up to date is very challenging. According to a coder proverb:
 

src/content/8/en/part8e.md

@@ -637,7 +637,7 @@ If the subscription does not work, check that you have the correct connection se
 
 The backend code can be found on [GitHub](https://github.com/fullstack-hy2020/graphql-phonebook-backend/tree/part8-7), branch <i>part8-7</i>.
 
-Implementing subscriptions involves a lot of configurations. You will be able to cope with the few exercises of this course without worrying much about the details. If you are planning to use subscriptions in an production use application, you should definitely read Apollo's [documentation on subscriptions](https://www.apollographql.com/docs/apollo-server/data/subscriptions) carefully.
+Implementing subscriptions involves a lot of configurations. You will be able to cope with the few exercises of this course without worrying much about the details. If you are planning to use subscriptions in a production application, you should definitely read Apollo's [documentation on subscriptions](https://www.apollographql.com/docs/apollo-server/data/subscriptions) carefully.
 
 ### Subscriptions on the client