add a user data

docs/tutorial/preliminary.rst

@@ -331,14 +331,14 @@ Let's insert these different possible choices with a `choice` variable's propert
 
 :tutorial:`Download this file from the rougail-tutorials git repository <src/tag/v1.1_004/firefox/00-proxy.yml>`
 
-- Let's run the Rougail CLI now:
+- Let's run the Rougail CLI without user datas:
 
 .. code-block:: text
    :class: terminal
    
     rougail -v 1.1 -m firefox/
 
-We have an output like this one: 
+We have this output:
 
 .. raw:: html
    :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_004/config/01/output_ro.html
@@ -357,10 +357,45 @@ We have an output like this one:
 
 The `proxy_mode` variable here, implicitely requires a value. It is a :term:`mandatory` variable.
 
-As we set the `proxy_mode` variable as `No proxy` by default, we actually have specified a value, 
+As we set the `proxy_mode` variable as `No proxy` by default, we have specified a value, 
 and the value appears in yellow, which means : "set by default". 
 
-.. todo:: ajouter une sortie qui montre que la valeur provient du user data file.
+.. type-along:: Let's add a user value
+
+Now an integrator decides to set the value of the `proxy_mode` variable to `Manual proxy configuration`.
+
+.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_004/config/03/config.yml
+   :linenos:
+   :language: yaml
+   :caption: A user data specification
+
+:tutorial:`Download this file from the rougail-tutorials git repository <src/tag/v1.1_004/config/03/config.yml>`
+
+If we run the rougail CLI with this user datas, we have:
+
+.. code-block:: text
+   :class: terminal
+
+   rougail -m firefox -u yaml -ff config/03/config.yaml
+
+We have this output:
+
+.. raw:: html
+   :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_004/config/03/output_ro.html
+   :class: output
+
+.. 
+    <pre>╭────────────── Caption ───────────────╮
+    │ Variable Modified value              │
+    │          (<span style="color: #00aa00">⏳ Original default value</span>) │
+    ╰──────────────────────────────────────╯
+    Variables:
+    <span style="color: #5c5cff">┗━━ </span>📓 Configure Proxy Access to the Internet: Manual proxy configuration ◀ loaded from the YAML file "config/03/config.yml" (⏳ <span style="color: #00aa00">No proxy</span>)
+    </pre>
+
+As we set the `proxy_mode` variable from a user data file, 
+we now have specified a value which is **not** a default value, 
+and the value appears in green, which means : "user data value". 
 
 .. type-along:: The constraints that come with the `choice` property