spinbutton: Use markdown for css tree

diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index 61602b307f52b2509006fb208e3f1508d44623e4..6030261cd44c85de1c4c5f8362990ff61665765d 100644 (file)
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -157,23 +157,23 @@
  *
  * # CSS nodes
  *
- * |[<!-- language="plain" -->
+ * ```
  * spinbutton.horizontal
  * ├── text
  * │    ├── undershoot.left
  * │    ╰── undershoot.right
  * ├── button.down
  * ╰── button.up
- * ]|
+ * ```
  *
- * |[<!-- language="plain" -->
+ * ```
  * spinbutton.vertical
  * ├── button.up
  * ├── text
  * │    ├── undershoot.left
  * │    ╰── undershoot.right
  * ╰── button.down
- * ]|
+ * ```
  *
  * `GtkSpinButton`s main CSS node has the name spinbutton. It creates subnodes
  * for the entry and the two buttons, with these names. The button nodes have