T.concat
  [
    "user error: event has undeclared type \"baz\"\n",
    "test/data/parser/err_002.clp:6:\n",
    "  | 2025-10-02 22:59:05 ... 2025-10-02 22:59:06\n",
    "6 |   type:baz\n",
    "  |   ^^^^^^^^\n",
    "  | \n"]