windowcontrols: Use markdown for css tree

diff --git a/gtk/gtkwindowcontrols.c b/gtk/gtkwindowcontrols.c
index c3649396892b96c0ea5bdfface72a9a9ec9a65bc..5cd8bce1c9c5289a4460b3603c73f3e62beaf0ca 100644 (file)
--- a/gtk/gtkwindowcontrols.c
+++ b/gtk/gtkwindowcontrols.c
@@ -64,13 +64,13 @@
  *
  * # CSS nodes
  *
- * |[<!-- language="plain" -->
+ * ```
  * windowcontrols
  * ├── [image.icon]
  * ├── [button.minimize]
  * ├── [button.maximize]
  * ╰── [button.close]
- * ]|
+ * ```
  *
  * A `GtkWindowControls`' CSS node is called windowcontrols. It contains
  * subnodes corresponding to each title button. Which of the title buttons