minor #4743 [Book][Security] Fix typo and remove redundant sentence (xelaris)

This PR was merged into the 2.3 branch.

Discussion
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[Book][Security] Fix typo and remove redundant sentence

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | >=2.3
| Fixed tickets |

Commits
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f56d26f Fix typo and remove redundant sentence

Author: weaverryan

book/security.rst

@@ -655,7 +655,7 @@ There are **two** ways to deny access to something:
 Securing URL patterns (access_control)
 ......................................
 
-The most basic way to secure part of your application is to secure an entire
+The most basic way to secure parts of your application is to secure an entire
 URL pattern. You saw this earlier, where anything matching the regular expression
 ``^/admin`` requires the ``ROLE_ADMIN`` role:
 
@@ -1082,8 +1082,7 @@ Next, you'll need to create a route for this URL (but not a controller):
         return $collection;
 
 And that's it! By sending a user to ``/logout`` (or whatever you configure
-the ``path`` to be), Symfony will un-authenticate the current user. and 
-redirect them the homepage (the value defined by ``target``).
+the ``path`` to be), Symfony will un-authenticate the current user.
 
 Once the user has been logged out, they will be redirected to whatever path
 is defined by the ``target`` parameter above (e.g. the ``homepage``).