Updated interfaces from specification

src/ClientExceptionInterface.php

@@ -3,8 +3,8 @@
 namespace Psr\Http\Client;
 
 /**
- * Every HTTP client related Exception MUST implement this interface.
+ * Every HTTP client related exception MUST implement this interface.
  */
 interface ClientExceptionInterface extends \Throwable
 {
-}
+}

src/ClientInterface.php

@@ -10,17 +10,6 @@ interface ClientInterface
     /**
      * Sends a PSR-7 request and returns a PSR-7 response.
      *
-     * Every technically correct HTTP response MUST be returned as-is, even if it represents an HTTP
-     * error response or a redirect instruction. The only special case is 1xx responses, which MUST
-     * be assembled in the HTTP client.
-     *
-     * The client MAY do modifications to the Request before sending it. Because PSR-7 objects are
-     * immutable, one cannot assume that the object passed to ClientInterface::sendRequest() will be the same
-     * object that is actually sent. For example, the Request object that is returned by an exception MAY
-     * be a different object than the one passed to sendRequest, so comparison by reference (===) is not possible.
-     *
-     * {@link https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-7-http-message-meta.md#why-value-objects}
-     *
      * @param RequestInterface $request
      *
      * @return ResponseInterface

src/NetworkExceptionInterface.php

@@ -21,4 +21,4 @@ interface NetworkExceptionInterface extends ClientExceptionInterface
      * @return RequestInterface
      */
     public function getRequest(): RequestInterface;
-}
+}