symfony
diff --git a/‎book/security.rst
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+2-2Lines changed: 2 additions & 2 deletions b/‎book/security.rst
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+2-2Lines changed: 2 additions & 2 deletions
diff --git a/‎components/routing/hostname_pattern.rst
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diff --git a/‎contributing/community/releases.rst
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@@ -20,8 +20,8 @@ perform a certain action.
 .. image:: /images/book/security_authentication_authorization.png
    :align: center
 
-Since the best way to learn is to see an example, start by securing your
-application with HTTP Basic authentication.
+Since the best way to learn is to see an example, just imagine that you want
+to secure your application with HTTP Basic authentication.
 
 .. note::
 
 
@@ -180,9 +180,9 @@ instance, if you want to match both ``m.example.com`` and
 
     .. tip::
 
-       Make sure you also include a default option for the ``subdomain``
-       placeholder, otherwise you need to include the subdomains value each time
-       you generate the route.
+       Make sure you also include a default option for the ``domain`` placeholder,
+       otherwise you need to include a domain value each time you generate
+       a URL using the route.
 
     .. configuration-block::
 
 
@@ -25,7 +25,7 @@ with a development period, followed by a maintenance period.
 Development
 -----------
 
-The first six-month period is divided into two phases:
+The full development period lasts six months and is divided into two phases:
 
 * *Development*: *Four months* to add new features and to enhance existing
   ones;
@@ -126,11 +126,12 @@ This results in very predictable dates and maintenance periods:
 Backward Compatibility
 ----------------------
 
-Our `Backwards Compatibility Promise`_ is very strict and allows developers to
-upgrade with confidence from one minor version of Symfony to the next one.
+Our :doc:`Backwards Compatibility Promise </contributing/code/bc>` is very
+strict and allows developers to upgrade with confidence from one minor version
+of Symfony to the next one.
 
 Whenever keeping backward compatibility is not possible, the feature, the
-enhancement, or the bug fix will be scheduled for the next major version.
+enhancement or the bug fix will be scheduled for the next major version.
 
 .. note::