minor #6278 [HttpFoundation] Fix typo for ParameterBag getters (rendler-denis)

This PR was submitted for the 2.7 branch but it was merged into the 2.3 branch instead (closes #6278).

Discussion
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[HttpFoundation] Fix typo for ParameterBag getters

[HttpFoundation] Fix typo for max number of arguments for ParameterBag getters

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.7
| Fixed tickets | ~

Commits
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9a06dab [HttpFoundation] Fix typo for ParameterBag getters

Author: xabbuh

components/http_foundation/introduction.rst

@@ -134,8 +134,8 @@ has some methods to filter the input values:
 :method:`Symfony\\Component\\HttpFoundation\\ParameterBag::filter`
     Filters the parameter by using the PHP :phpfunction:`filter_var` function.
 
-All getters takes up to three arguments: the first one is the parameter name
-and the second one is the default value to return if the parameter does not
+All getters take up to three arguments: the first one is the parameter name and 
+the second one is the default value to return if the parameter does not
 exist::
 
     // the query string is '?foo=bar'
@@ -148,6 +148,7 @@ exist::
 
     $request->query->get('bar', 'bar');
     // returns 'bar'
+  
 
 When PHP imports the request query, it handles request parameters like
 ``foo[bar]=bar`` in a special way as it creates an array. So you can get the