Merge branch '4.4' into 5.2

* 4.4: Minor tweaks Adds a heading for stampede prevention so I'm able to reference this section easily Update routing.rst

Author: javiereguiluz

components/cache.rst

@@ -90,7 +90,10 @@ generate and return the value::
  Use cache tags to delete more than one key at the time. Read more at
  :doc:`/components/cache/cache_invalidation`.
 
-The Cache Contracts also comes with built in `Stampede prevention`_. This will
+Stampede Prevention
+~~~~~~~~~~~~~~~~~~~
+
+The Cache Contracts also come with built in `Stampede prevention`_. This will
 remove CPU spikes at the moments when the cache is cold. If an example application
 spends 5 seconds to compute data that is cached for 1 hour and this data is accessed
 10 times every second, this means that you mostly have cache hits and everything

routing.rst

@@ -2431,7 +2431,7 @@ use the ``generateUrl()`` helper::
 
  While objects are converted to string when used as placeholders, they are not
  converted when used as extra parameters. So, if you're passing an object (e.g. an Uuid)
- as value of an extra parameter, you need to explictly convert it to a string::
+ as value of an extra parameter, you need to explicitly convert it to a string::
 
  $this->generateUrl('blog', ['uuid' => (string) $entity->getUuid()]);