minor #16275 Correct spelling & grammar in 4.4 introduction/ (gnito-org)

This PR was merged into the 4.4 branch.

Discussion
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Correct spelling & grammar in 4.4 introduction/

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7c8b923 Correct spelling & grammar in 4.4 introduction/

Author: javiereguiluz

introduction/from_flat_php_to_symfony.rst

@@ -402,7 +402,7 @@ have *many* controller functions: one for each page.
 
 By now, the application has evolved from a single PHP file into a structure
 that is organized and allows for code reuse. You should be happier, but far
-from satisfied. For example, the routing system is fickle, and wouldn't
+from being satisfied. For example, the routing system is fickle, and wouldn't
 recognize that the list page - ``/index.php``  - should be accessible also via ``/``
 (if Apache rewrite rules were added). Also, instead of developing the blog,
 a lot of time is being spent working on the "architecture" of the code (e.g.

introduction/http_fundamentals.rst

@@ -234,10 +234,10 @@ have all the request information at your fingertips::
     $request->getMethod();    // e.g. GET, POST, PUT, DELETE or HEAD
     $request->getLanguages(); // an array of languages the client accepts
 
-As a bonus, the ``Request`` class does a lot of work in the background that
-you'll never need to worry about. For example, the ``isSecure()`` method
+As a bonus, the ``Request`` class does a lot of work in the background about which
+you will never need to worry. For example, the ``isSecure()`` method
 checks the *three* different values in PHP that can indicate whether or not
-the user is connecting via a secured connection (i.e. HTTPS).
+the user is connecting via a secure connection (i.e. HTTPS).
 
 Symfony Response Object
 ~~~~~~~~~~~~~~~~~~~~~~~