Update extension.rst - added caution box for people trying to remove the default file with services definitions

Pavel Jurecka · Pavel Jurecka · commit 48da2d709829 · 2016-03-09T21:47:04.000+01:00
diff --git a/cookbook/bundles/extension.rst b/cookbook/bundles/extension.rst
@@ -119,3 +119,8 @@ Using Configuration to Change the Services
 The Extension is also the class that handles the configuration for that
 particular bundle (e.g. the configuration in ``app/config/config.yml``). To
 read more about it, see the ":doc:`/cookbook/bundles/configuration`" article.
+
+.. caution::
+
+    If you removed the default file with services definitions (i. e. ``app/config/services.yml``),
+    make sure to also remove it from the ``imports`` key in ``app/config/config.yml``.
