Encountered an error when following the steps for contribution. Updated the contribution overview to reflect how to avoid that error when transitioning between steps 3 and 4 in Your First Documentation Contribution

Author: chancegarcia

contributing/documentation/overview.rst

@@ -112,20 +112,6 @@ Fetch the upstream branch list.
 .. code-block:: bash
 
     $ git fetch upstream
-    From https://github.com/symfony/symfony-docs
-     * [new branch]      2.0        -> upstream/2.0
-     * [new branch]      2.1        -> upstream/2.1
-     * [new branch]      2.2        -> upstream/2.2
-     * [new branch]      2.3        -> upstream/2.3
-     * [new branch]      2.4        -> upstream/2.4
-     * [new branch]      2.5        -> upstream/2.5
-     * [new branch]      2.6        -> upstream/2.6
-     * [new branch]      2.7        -> upstream/2.7
-     * [new branch]      2.8        -> upstream/2.8
-     * [new branch]      3.0        -> upstream/3.0
-     * [new branch]      3.1        -> upstream/3.1
-     * [new branch]      master     -> upstream/master
-
 
 The purpose of this step is to allow you work simultaneously on the official
 Symfony repository and on your own fork. You'll see this in action in a moment.