cours: keep warnings

That way you see them while you're watching the changes!

cours/source/conf.py

@@ -11,6 +11,7 @@ language = "fr"
 
 templates_path = ["_templates"]
 exclude_patterns = []
+keep_warnings = True
 
 html_show_sourcelink = False
 html_theme_path = [sphinx_nameko_theme.get_html_theme_path()]