Merge branch '2.8'

* 2.8:
  Reworded a note about BC
  Added a note about the implementation of the verbosity semantic methods
  Fixed some minor syntax issues.
  Reflect links correctly in gmail.rst
  Revisions to the gmail.rst doc
  Update gmail.rst
  Minor grammar fix.
  Fix RST

Author: weaverryan

Diff for: book/installation.rst

@@ -127,7 +127,7 @@ based on `Composer`_.
 
 Composer is the dependency manager used by modern PHP applications and it can
 also be used to create new applications based on the Symfony Framework. If you
-don't have installed it globally, start by reading the next section.
+don't have it installed globally, start by reading the next section.
 
 Installing Composer Globally
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Diff for: components/console/introduction.rst

@@ -223,6 +223,13 @@ verbosity levels::
         // ...
     }
 
+.. note::
+
+    These semantic methods are defined in the ``OutputInterface`` starting from
+    Symfony 3.0. In previous Symfony versions they are defined in the different
+    implementations of the interface (e.g. :class:`Symfony\\Component\\Console\\Output\\Output`)
+    in order to keep backwards compatibility.
+
 When the quiet level is used, all output is suppressed as the default
 :method:`Symfony\\Component\\Console\\Output\\Output::write` method returns
 without actually printing.

Diff for: cookbook/email/gmail.rst

@@ -75,3 +75,13 @@ You're done!
 
     The ``gmail`` transport is simply a shortcut that uses the ``smtp`` transport
     and sets ``encryption``, ``auth_mode`` and ``host`` to work with Gmail.
+
+.. note::
+
+    Depending on your Gmail account settings, you may get authentication errors
+    within your app. If your Gmail account uses 2-Step-Verification, you should
+    `generate an App password`_ to use for your ``mailer_password`` parameter.
+    You should also ensure that you `allow less secure apps to access your Gmail account`_.
+
+.. _`generate an App password`: https://support.google.com/accounts/answer/185833
+.. _`allow less secure apps to access your Gmail account`: https://support.google.com/accounts/answer/6010255

Diff for: create_framework/routing.rst

@@ -158,7 +158,7 @@ With this knowledge in mind, let's write the new version of our framework::
 
     $response->send();
 
-There are a few new things in the code::
+There are a few new things in the code:
 
 * Route names are used for template names;