docs: def _make_node(self, singular, plural, variables, plural_expr):
          """Generates a useful node from the data provided."""
          # singular only:
          if plural_expr is None:
              gettext = nodes.Name('gettext', 'load')
              node = nodes.Call(gettext, [nodes.Const(singular)],
                                [], None, None)
  
          # singular and plural
          else:
              ngettext = nodes.Name('ngettext', 'load')
              node = nodes.Call(ngettext, [
                  nodes.Const(singular),
                  nodes.Const(plural),
                  plural_expr
              ], [], None, None)
  
          # mark the return value as safe if we are in an
          # environment with autoescaping turned on
          if self.environment.autoescape:
              node = nodes.MarkSafe(node)
  
          if variables:
              node = nodes.Mod(node, variables)
          return nodes.Output([node])