Fix for blank lines around code fences (#38255)

content/get-started/getting-started-with-git/setting-your-username-in-git.md

@@ -23,11 +23,13 @@ Changing the name associated with your Git commits using `git config` will only
 {% data reusables.command_line.open_the_multi_os_terminal %}
 
 2. {% data reusables.user-settings.set_your_git_username %}
+
    ```shell
    git config --global user.name "Mona Lisa"
    ```
 
 3. {% data reusables.user-settings.confirm_git_username_correct %}
+
    ```shell
    $ git config --global user.name
    > Mona Lisa
@@ -40,11 +42,13 @@ Changing the name associated with your Git commits using `git config` will only
 2. Change the current working directory to the local repository where you want to configure the name that is associated with your Git commits.
 
 3. {% data reusables.user-settings.set_your_git_username %}
+
    ```shell
    git config user.name "Mona Lisa"
    ```
 
 3. {% data reusables.user-settings.confirm_git_username_correct %}
+
    ```shell
    $ git config user.name
    > Mona Lisa