Update comment (Thanks Merovius)

include/floating.h

@@ -62,8 +62,8 @@ void floating_drag_window(xcb_connection_t *conn, Client *client,
                           xcb_button_press_event_t *event);
 
 /**
- * Called when the user right-clicked on the titlebar of a floating window to
- * resize it.
+ * Called when the user clicked on a floating window while holding the
+ * floating_modifier and the right mouse button.
  * Calls the drag_pointer function with the resize_window callback
  *
  */

src/floating.c

@@ -299,8 +299,8 @@ DRAGGING_CB(resize_window_callback) {
 }
 
 /*
- * Called when the user right-clicked on the titlebar of a floating window to
- * resize it.
+ * Called when the user clicked on a floating window while holding the
+ * floating_modifier and the right mouse button.
  * Calls the drag_pointer function with the resize_window callback
  *
  */