Merge branch '4.4' into 5.0

* 4.4:
  Fix small linguistic error
  minor
  Update http_cache.rst

Author: javiereguiluz

http_cache.rst

@@ -137,7 +137,7 @@ method::
 
     class CacheKernel extends HttpCache
     {
-        protected function getOptions()
+        protected function getOptions(): array
         {
             return [
                 'default_ttl' => 0,

security/impersonating_user.rst

@@ -193,8 +193,8 @@ Limiting User Switching
 
 If you need more control over user switching, you can use a security voter. First,
 configure ``switch_user`` to check for some new, custom attribute. This can be
-anything, but *cannot* start with ``ROLE_`` (to enforce that only your voter will)
-be called:
+anything, but *cannot* start with ``ROLE_`` (to enforce that only your voter will 
+be called):
 
 .. configuration-block::