[gtksourceview] vim: fix code example for GtkSourceVimIMContext

[Christian Hergert <chergert src gnome org>]

commit ae834d82b0f37b04257c74e60317f8021fe5983b
Author: Christian Hergert <chergert redhat com>
Date:   Tue Jun 21 11:37:22 2022 -0700

    vim: fix code example for GtkSourceVimIMContext

 gtksourceview/gtksourcevimimcontext.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gtksourceview/gtksourcevimimcontext.c b/gtksourceview/gtksourcevimimcontext.c
index c7569bf8..087d5031 100644
--- a/gtksourceview/gtksourcevimimcontext.c
+++ b/gtksourceview/gtksourcevimimcontext.c
@@ -62,8 +62,8 @@
  *
  * ```c
  * GtkEventController *key;
- * GtkSourceView *view;
  * GtkIMContext *im_context;
+ * GtkWidget *view;
  *
  * view = gtk_source_view_new ();
  * im_context = gtk_source_vim_im_context_new ();
@@ -71,7 +71,8 @@
  *
  * gtk_event_controller_key_set_im_context (GTK_EVENT_CONTROLLER_KEY (key), im_context);
  * gtk_event_controller_set_propagation_phase (key, GTK_PHASE_CAPTURE);
- * gtk_widget_add_controller (GTK_WIDGET (view), key);
+ * gtk_widget_add_controller (view, key);
+ * gtk_im_context_set_client_widget (im_context, view);
  *
  * g_object_bind_property (im_context, "command-bar-text", command_bar_label, "label", 0);
  * g_object_bind_property (im_context, "command-text", command_label, "label", 0);