Fix for blank lines around code fences (#38255)

content/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent.md

@@ -48,13 +48,17 @@ If you are a site administrator for {% data variables.location.product_location
    ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
 
    ```
+
    {%- else %}
+
    ```shell
    ssh-keygen -t ed25519 -C "your_email@example.com"
    ```
+
    {% note %}
 
    **Note:** If you are using a legacy system that doesn't support the Ed25519 algorithm, use:
+
    ```shell
     ssh-keygen -t rsa -b 4096 -C "your_email@example.com"
    ```
@@ -63,9 +67,11 @@ If you are a site administrator for {% data variables.location.product_location
    {%- endif %}
 
    This creates a new SSH key, using the provided email as a label.
+
    ```shell
    > Generating public/private ALGORITHM key pair.
    ```
+
 When you're prompted to "Enter a file in which to save the key", you can press **Enter** to accept the default file location. Please note that if you created SSH keys previously, ssh-keygen may ask you to rewrite another key, in which case we recommend creating a custom-named SSH key. To do so, type the default file location and replace id_ssh_keyname with your custom key name.
 
    {% mac %}
@@ -93,6 +99,7 @@ When you're prompted to "Enter a file in which to save the key", you can press *
    {% endlinux %}
 
 1. At the prompt, type a secure passphrase. For more information, see "[AUTOTITLE](/authentication/connecting-to-github-with-ssh/working-with-ssh-key-passphrases)."
+
    ```shell
    > Enter passphrase (empty for no passphrase): [Type a passphrase]
    > Enter same passphrase again: [Type passphrase again]
@@ -142,12 +149,15 @@ Before adding a new SSH key to the ssh-agent to manage your keys, you should hav
        Host {% ifversion ghes or ghae %}HOSTNAME{% else %}github.com{% endif %}
          IgnoreUnknown UseKeychain
        ```
+
      {% endnote %}
 
 1. Add your SSH private key to the ssh-agent and store your passphrase in the keychain. {% data reusables.ssh.add-ssh-key-to-ssh-agent %}
+
    ```shell
    ssh-add --apple-use-keychain ~/.ssh/id_{% ifversion ghae %}rsa{% else %}ed25519{% endif %}
    ```
+
    {% note %}
 
    **Note:** The `--apple-use-keychain` option stores the passphrase in your keychain for you when you add an SSH key to the ssh-agent. If you chose not to add a passphrase to your key, run the command without the `--apple-use-keychain` option.
@@ -169,6 +179,7 @@ Before adding a new SSH key to the ssh-agent to manage your keys, you should hav
 {% data reusables.desktop.windows_git_bash %}
 
 1. Ensure the ssh-agent is running. You can use the "Auto-launching the ssh-agent" instructions in "[Working with SSH key passphrases](/articles/working-with-ssh-key-passphrases)", or start it manually:
+
    ```shell
    # start the ssh-agent in the background
    $ eval "$(ssh-agent -s)"
@@ -200,6 +211,7 @@ If you are using macOS or Linux, you may need to update your SSH client or insta
 1. Insert your hardware security key into your computer.
 {% data reusables.command_line.open_the_multi_os_terminal %}
 1. Paste the text below, substituting in the email address for your account on {% data variables.product.product_name %}.
+
    ```shell
    ssh-keygen -t {% ifversion ghae %}ecdsa{% else %}ed25519{% endif %}-sk -C "YOUR_EMAIL"
    ```
@@ -208,6 +220,7 @@ If you are using macOS or Linux, you may need to update your SSH client or insta
    {% note %}
 
    **Note:** If the command fails and you receive the error `invalid format` or `feature not supported,` you may be using a hardware security key that does not support the Ed25519 algorithm. Enter the following command instead.
+
    ```shell
     ssh-keygen -t ecdsa-sk -C "your_email@example.com"
    ```
@@ -242,8 +255,10 @@ If you are using macOS or Linux, you may need to update your SSH client or insta
    {% endlinux %}
 
 1. When you are prompted to type a passphrase, press **Enter**.
+
    ```shell
    > Enter passphrase (empty for no passphrase): [Type a passphrase]
    > Enter same passphrase again: [Type passphrase again]
    ```
+
 {% data reusables.ssh.add-public-key-to-github %}

content/authentication/connecting-to-github-with-ssh/testing-your-ssh-connection.md

@@ -23,6 +23,7 @@ When you test your connection, you'll need to authenticate this action using you
 
 {% data reusables.command_line.open_the_multi_os_terminal %}
 2. Enter the following:
+
    ```shell
    $ ssh -T git@{% data variables.command_line.codeblock %}
    # Attempts to ssh to {% data variables.product.product_name %}
@@ -37,6 +38,7 @@ When you test your connection, you'll need to authenticate this action using you
    ```
 
 3. Verify that the fingerprint in the message you see matches {% ifversion fpt or ghec %}[{% data variables.product.prodname_dotcom %}'s public key fingerprint](/authentication/keeping-your-account-and-data-secure/githubs-ssh-key-fingerprints){% else %} your enterprise's public key fingerprint{% endif %}. If it does, then type `yes`:
+
    ```shell
    > Hi USERNAME! You've successfully authenticated, but GitHub does not
    > provide shell access.
@@ -45,6 +47,7 @@ When you test your connection, you'll need to authenticate this action using you
    {% linux %}
 
    You may see this error message:
+
    ```shell
    ...
    Agent admitted failure to sign using the key.