add modif

docs/tutorial/preliminary.rst

@@ -351,6 +351,45 @@ The constraints that come with the `choice` type
 
 We say that the `proxy_mode` variable is *constrained* (by the `choice` type).
 
+.. 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". 
+
+.. FIXME: verifier que cette sortie est bonne (on a des valeurs différentes)
+
+.. type-along:: The constraints that come with the `choice` property
+
+The `proxy_mode` variable's possible values is *constrained*.
+
 We have the list of the possible (authorized) values:
 
 - `No proxy`