Apply some fixes suggested by proselint

admin/handling-relations-to-collections.md

@@ -71,8 +71,6 @@ class Book
 
 The admin handles this `to-many` relation automatically!
 
-But we can go further:
-
 ## Customizing a Property
 
 Let's customize the components used for the `authors` property, to display them by their 'name' instead 'id' (the default behavior).

client-generator/index.md

@@ -1,6 +1,6 @@
 # The API Platform Client Generator
 
-Client Generator is the fastest way to scaffold fully-featured webapps and native mobile apps from APIs supporting the [Hydra](http://www.hydra-cg.com/) format.
+Client Generator is the fastest way to scaffold fully featured webapps and native mobile apps from APIs supporting the [Hydra](http://www.hydra-cg.com/) format.
 
 ![Screencast](images/client-generator-demo.gif)
 

core/file-upload.md

@@ -252,5 +252,5 @@ uploaded cover, you can have a nice illustrated book record!
 }
 ```
 
-Voila! You can now send files to your API, and link them to any other resources
+Voilà! You can now send files to your API, and link them to any other resources
 in your app.

core/serialization.md

@@ -58,7 +58,7 @@ all set!
 
 It is simple to specify what groups to use in the API system:
 
-1. Add the `normalizationContext` and `denormalizationContext` annotation properties to the `@ApiResource` annotation, and specify which groups to use. Here you see that we add `read` and `write`, respectively.  You can use any group names you wish.
+1. Add the `normalizationContext` and `denormalizationContext` annotation properties to the `@ApiResource` annotation, and specify which groups to use. Here you see that we add `read` and `write`, respectively. You can use any group names you wish.
 2. Apply the `@Groups` annotation to properties in the object.
 
 ```php
@@ -129,7 +129,7 @@ App\Entity\Book:
 ```
 
 In the previous example, the `name` property will be visible when reading (`GET`) the object, and it will also be available
-to write (`PUT/POST`).  The `author` property will be write-only; it will not be visible when serialized responses are 
+to write (`PUT/POST`). The `author` property will be write-only; it will not be visible when serialized responses are 
 returned by the API.
 
 Internally, API Platform passes the value of the `normalization_context` to the Symfony Serializer during the normalization
@@ -415,7 +415,7 @@ final class BookContextBuilder implements SerializerContextBuilderInterface
 ```
 
 If the user has the `ROLE_ADMIN` permission and the subject is an instance of Book, `admin_input` group will be dynamically added to the 
-denormalization context.  The `$normalization` variable lets you check whether the context is for normalization (if `TRUE`) or denormalization 
+denormalization context. The `$normalization` variable lets you check whether the context is for normalization (if `TRUE`) or denormalization 
 (`FALSE`).
 
 ## Changing the Serialization Context on a Per-item Basis
@@ -500,8 +500,8 @@ class BookAttributeNormalizer implements ContextAwareNormalizerInterface, Normal
 This will add the serialization group `can_retrieve_book` only if the currently logged-in user has access to the given book 
 instance.
 
-Note: In this example, we use the `TokenStorageInterface` to verify access to the book instance.  However, Symfony 
-provides many useful other services that might be better suited to your use case.  For example, the [`AuthorizationChecker`](https://symfony.com/doc/current/components/security/authorization.html#authorization-checker).
+Note: In this example, we use the `TokenStorageInterface` to verify access to the book instance. However, Symfony 
+provides many useful other services that might be better suited to your use case. For example, the [`AuthorizationChecker`](https://symfony.com/doc/current/components/security/authorization.html#authorization-checker).
 
 ## Name Conversion
 
@@ -524,7 +524,7 @@ api_platform:
 
 ## Decorating a Serializer and Adding Extra Data
 
-In the following example, we will see how we add extra informations to the serialized output.  Here is how we add the 
+In the following example, we will see how we add extra informations to the serialized output. Here is how we add the 
 date on each request in `GET`:
 
 ```yaml
@@ -599,7 +599,7 @@ API Platform is able to guess the entity identifier using [Doctrine metadata](ht
 It also supports composite identifiers.
 
 If you are not using the Doctrine ORM Provider, you must explicitly mark the identifier using the `identifier` attribute of
-the `ApiPlatform\Core\Annotation\ApiProperty` annotation.  For example:
+the `ApiPlatform\Core\Annotation\ApiProperty` annotation. For example:
 
 
 ```php
@@ -644,7 +644,7 @@ App\Entity\Book:
 ```
 
 In some cases, you will want to set the identifier of a resource from the client (e.g. a client-side generated UUID, or a slug).
-In such cases, you must make the identifier property a writable class property.  Specifically, to use client-generated IDs, you 
+In such cases, you must make the identifier property a writable class property. Specifically, to use client-generated IDs, you 
 must do the following:
 
 1. create a setter for the identifier of the entity (e.g. `public function setId(string $id)`) or make it a `public` property ,

deployment/kubernetes.md

@@ -83,7 +83,7 @@ Before running your application for the first time, be sure to create the databa
 
 ## Tiller RBAC Issue
 
-We noticed that some tiller RBAC trouble occured, you generally can resolve it running:
+We noticed that some tiller RBAC trouble occurred, you generally can resolve it running:
 
     kubectl create serviceaccount --namespace kube-system tiller
       serviceaccount "tiller" created

distribution/index.md

@@ -6,7 +6,7 @@
 > - Fabien Potencier (creator of Symfony), SymfonyCon 2017
 
 [API Platform](https://api-platform.com) is a powerful but easy to use **full stack** framework dedicated to API-driven projects.
-It contains a **PHP** library to create fully-featured APIs supporting industry-leading standards (JSON-LD, GraphQL, OpenAPI...),
+It contains a **PHP** library to create fully featured APIs supporting industry-leading standards (JSON-LD, GraphQL, OpenAPI...),
 provides ambitious **JavaScript** tooling to consume those APIs in a snap (admin, PWA and mobile apps generators, hypermedia
 client...) and is shipped with a nice **Docker** and **Kubernetes** integration to develop and deploy instantly in the cloud.
 
@@ -510,7 +510,7 @@ Now try to add another book by issuing a `POST` request to `/books` with the fol
 }
 ```
 
-Oops, we missed to add the title. But submit the request anyway. You should get a 500 error with the following message:
+Oops, we missed to add the title. Submit the request anyway, you should get a 500 error with the following message:
 
     An exception occurred while executing 'INSERT INTO book [...] VALUES [...]' with params [...]:
     SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'title' cannot be null