[gtk/ebassi/gidocgen] checkbutton: Use markdown for css tree

[Matthias Clasen <matthiasc src gnome org>]

commit 44b03dfc42979bec1b1d4938dd63fc23c2b95cea
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Feb 27 19:44:51 2021 -0500

    checkbutton: Use markdown for css tree

 gtk/gtkcheckbutton.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtkcheckbutton.c b/gtk/gtkcheckbutton.c
index 2f7e697278..7e81531abd 100644
--- a/gtk/gtkcheckbutton.c
+++ b/gtk/gtkcheckbutton.c
@@ -46,8 +46,8 @@
  *
  * ![Example GtkCheckButtons](check-button.png)
  *
- * A `GtkCheckButton` is created by calling either [ctor Gtk CheckButton new] or
- * [ctor@Gtk.CheckButton.new_with_label].
+ * A `GtkCheckButton` is created by calling either [ctor Gtk CheckButton new]
+ * or [ctor@Gtk.CheckButton.new_with_label].
  *
  * The state of a `GtkCheckButton` can be set specifically using
  * [method@Gtk.CheckButton.set_active], and retrieved using
@@ -79,11 +79,11 @@
  *
  * # CSS nodes
  *
- * |[<!-- language="plain" -->
+ * ```
  * checkbutton[.text-button]
  * ├── check
  * ╰── [label]
- * ]|
+ * ```
  *
  * A `GtkCheckButton` has a main node with name checkbutton. If the
  * [property@GtkCheckButton:label] property is set, it contains a label
@@ -92,7 +92,7 @@
  *
  * # Accessibility
  *
- * `GtkCheckButton` uses the #GTK_ACCESSIBLE_ROLE_CHECKBOX role.
+ * `GtkCheckButton` uses the %GTK_ACCESSIBLE_ROLE_CHECKBOX role.
  */
 
 typedef struct {