infobar: Convert docs

Change link syntax, add an example image, generally clean things up.

diff --git a/gtk/gtkinfobar.c b/gtk/gtkinfobar.c
index 8213acf5ce71614f9897da9aa46d40a8945bc259..7ecd342593f38a2d4fbde2e770c0b3b4826033dc 100644 (file)
--- a/gtk/gtkinfobar.c
+++ b/gtk/gtkinfobar.c
@@ -56,7 +56,7 @@
  * `GtkInfoBar` is a widget that can be used to show messages to
  * the user without showing a dialog.
  *
- * ![An example GtkInfoBar](infobar.png)
+ * ![An example GtkInfoBar](info-bar.png)
  *
  * It is often temporarily shown at the top or bottom of a document.
  * In contrast to [class@Gtk.Dialog], which has an action area at the