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

[Matthias Clasen <matthiasc src gnome org>]

commit fea9fea4fa75d76bc997e9bf0f48a44a723bccd3
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Feb 27 20:05:59 2021 -0500

    searchentry: Use markdown for css tree

 gtk/gtksearchentry.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtksearchentry.c b/gtk/gtksearchentry.c
index a8292f880c..d3fe73a208 100644
--- a/gtk/gtksearchentry.c
+++ b/gtk/gtksearchentry.c
@@ -79,10 +79,10 @@
  *
  * # CSS Nodes
  *
- * |[<!-- language="plain" -->
+ * ```
  * entry.search
  * ╰── text
- * ]|
+ * ```
  *
  * `GtkSearchEntry` has a single CSS node with name entry that carries
  * a .sarch style class, and the text node is a child of that.