minor #15221 [HttpFoundation] Minor fixes (sebpacz)

This PR was merged into the 5.2 branch.

Discussion
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[HttpFoundation] Minor fixes

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Commits
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2a39702 [HttpFoundation] Minor fixes

Author: javiereguiluz

components/http_foundation.rst

@@ -190,7 +190,7 @@ Finally, the raw data sent with the request body can be accessed using
 
     $content = $request->getContent();
 
-For instance, this may be useful to process a XML string sent to the
+For instance, this may be useful to process an XML string sent to the
 application by a remote service using the HTTP POST method.
 
 If the request body is a JSON string, it can be accessed using
@@ -519,7 +519,7 @@ call::
         's_maxage'         => 600,
         'immutable'        => true,
         'last_modified'    => new \DateTime(),
-        'etag'             => 'abcdef'
+        'etag'             => 'abcdef',
     ]);
 
 .. versionadded:: 5.1