Tweak the wording

gtk/gskpango.c

@@ -462,7 +462,9 @@ gsk_pango_renderer_release (GskPangoRenderer *renderer)
  * current node.
  *
  * Note that if the layout does not contain any printable character, then
- * no node will be added to the @snapshot.
+ * current node.
+ *
+ * Note that if the layout does not produce any visible output, then nodes may not be added to the @snapshot.
  **/
 void
 gtk_snapshot_append_layout (GtkSnapshot   *snapshot,

gtk/gtksnapshot.c

@@ -300,7 +300,7 @@ gtk_snapshot_new (void)
  * Returns the node that was constructed by @snapshot
  * and frees @snapshot.
  *
- * See also gtk_snapshot_to_node().
+ * See also [method@Gtk.Snapshot.to_node].
  *
  * Returns: (transfer full) (nullable): a newly-created [class@Gsk.RenderNode]
  */