fix: Fix new expressions (kind property -> classname)

src/griffe/expressions.py

@@ -64,7 +64,7 @@ def _expr_as_dict(expression: Expr, **kwargs: Any) -> dict[str, Any]:
  for field in sorted(getfields(expression), key=lambda f: f.name)
  if field.name != "parent"
  }
- fields["cls"] = expression.__class__.__name__
+ fields["cls"] = expression.classname
  return fields
 
 
@@ -99,9 +99,9 @@ def as_dict(self, **kwargs: Any) -> dict[str, Any]:
  return _expr_as_dict(self, **kwargs)
 
  @property
- def kind(self) -> str:
- """The expression kind."""
- return self.__class__.__name__.lower()[4:]
+ def classname(self) -> str:
+ """The expression class name."""
+ return self.__class__.__name__
 
  @property
  def path(self) -> str:
@@ -1003,7 +1003,8 @@ def safe_get_expression(
  except ValueError:
  path = "<in-memory>"
  lineno = node.lineno # type: ignore[union-attr]
- message = msg_format.format(path=path, lineno=lineno, node_class=node_class, error=error)
+ error_str = f"{error.__class__.__name__}: {error}"
+ message = msg_format.format(path=path, lineno=lineno, node_class=node_class, error=error_str)
  getattr(logger, log_level.value)(message)
  return None