minor #6418 fix spelling of the flashBag() method (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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fix spelling of the flashBag() method

Commits
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1da9747 fix spelling of the flashBag() method

Author: xabbuh

book/controller.rst

@@ -671,7 +671,7 @@ read any flash messages from the session:
 
     .. code-block:: html+twig
 
-        {% for flash_message in app.session.flashbag.get('notice') %}
+        {% for flash_message in app.session.flashBag.get('notice') %}
             <div class="flash-notice">
                 {{ flash_message }}
             </div>

cookbook/session/avoid_session_start.rst

@@ -15,22 +15,22 @@ that a session is *always* started:
 
 .. code-block:: html+twig
 
-    {% for flashMessage in app.session.flashbag.get('notice') %}
+    {% for flashMessage in app.session.flashBag.get('notice') %}
         <div class="flash-notice">
             {{ flashMessage }}
         </div>
     {% endfor %}
 
 Even if the user is not logged in and even if you haven't created any flash messages,
-just calling the ``get()`` (or even ``has()``) method of the ``flashbag`` will
+just calling the ``get()`` (or even ``has()``) method of the ``flashBag`` will
 start a session. This may hurt your application performance because all users will
 receive a session cookie. To avoid this behavior, add a check before trying to
 access the flash messages:
 
 .. code-block:: html+twig
 
     {% if app.request.hasPreviousSession %}
-        {% for flashMessage in app.session.flashbag.get('notice') %}
+        {% for flashMessage in app.session.flashBag.get('notice') %}
             <div class="flash-notice">
                 {{ flashMessage }}
             </div>

quick_tour/the_controller.rst

@@ -331,7 +331,7 @@ And you can display the flash message in the template like this:
 
 .. code-block:: html+twig
 
-    {% for flashMessage in app.session.flashbag.get('notice') %}
+    {% for flashMessage in app.session.flashBag.get('notice') %}
         <div class="flash-notice">
             {{ flashMessage }}
         </div>
@@ -344,4 +344,4 @@ That's all there is to it and I'm not even sure you'll have spent the full
 10 minutes. You were briefly introduced to bundles in the first part and
 all the features you've learned about so far are part of the core FrameworkBundle.
 But thanks to bundles, everything in Symfony can be extended or replaced.
-That's the topic of the :doc:`next part of this tutorial <the_architecture>`.
+That's the topic of the :doc:`next part of this tutorial <the_architecture>`.