Issue #2459975 by fgm: RouteCacheContext / RouteNameCacheContext implement CacheContextInterface

core/lib/Drupal/Core/Cache/AccountPermissionsCacheContext.php

@@ -13,7 +13,7 @@
 /**
  * Defines the AccountPermissionsCacheContext service, for "per permission" caching.
  */
-class AccountPermissionsCacheContext extends UserCacheContext implements CacheContextInterface{
+class AccountPermissionsCacheContext extends UserCacheContext {
 
   /**
    * The permissions hash generator.

core/lib/Drupal/Core/Cache/RouteCacheContext.php

@@ -12,7 +12,7 @@
 /**
  * Defines the RouteCacheContext service, for "per route" caching.
  */
-class RouteCacheContext {
+class RouteCacheContext implements CacheContextInterface {
 
   /**
    * The route match.