code: def _clone_file_everywhere(self, finfo):
          
          for editorstack in self.editorstacks[1:]:
              editor = editorstack.clone_editor_from(finfo, set_current=False)
              self.register_widget_shortcuts(editor)
docs: Clone file (*src_editor* widget) in all editorstacks
          Cloning from the first editorstack in which every single new editor
          is created (when loading or creating a new file)