minor #3552 Fix typos (ifdattic)

This PR was merged into the 2.3 branch.

Discussion
----------

Fix typos

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

Commits
-------

7c361e1 Fix typos

book/doctrine.rst

@@ -622,7 +622,7 @@ Once you have your repository, you have access to all sorts of helpful methods::
 You can also take advantage of the useful ``findBy`` and ``findOneBy`` methods
 to easily fetch objects based on multiple conditions::
 
-    // query for one product matching be name and price
+    // query for one product matching by name and price
     $product = $repository->findOneBy(array('name' => 'foo', 'price' => 19.99));
 
     // query for all products matching the name, ordered by price

components/http_foundation/sessions.rst

@@ -254,7 +254,7 @@ has a simple API
   Adds a flash message to the stack of specified type;
 
 * :method:`Symfony\\Component\\HttpFoundation\\Session\\Flash\\FlashBagInterface::set`:
-  Sets flashes by type; This method conveniently takes both singles messages as
+  Sets flashes by type; This method conveniently takes both single messages as
   a ``string`` or multiple messages in an ``array``.
 
 * :method:`Symfony\\Component\\HttpFoundation\\Session\\Flash\\FlashBagInterface::get`:

components/http_kernel/introduction.rst

@@ -646,7 +646,7 @@ your controller).
    :align: center
 
 To execute a sub request, use ``HttpKernel::handle``, but change the second
-arguments as follows::
+argument as follows::
 
     use Symfony\Component\HttpFoundation\Request;
     use Symfony\Component\HttpKernel\HttpKernelInterface;

components/intl.rst

@@ -78,7 +78,7 @@ code::
 
     These versions are important when you deploy your application to a **server with
     a lower ICU version** than your development machines, because deployment will
-    fail if
+    fail if:
 
     * the development machines are compiled with ICU 4.4 or higher, but the
       server is compiled with a lower ICU version than 4.4;