/stations: document application/x-ndjson representation; put todos

routes/station.js

@@ -52,6 +52,7 @@ Returns a stop/station from [\`db-stations@3\`](https://github.com/derhuerst/db-
 						},
 					},
 				},
+				// todo: non-2xx response
 			},
 		},
 	},

routes/stations.js

@@ -166,8 +166,14 @@ Instead of receiving a JSON response, you can request [newline-delimited JSON](h
 							},
 							// todo: example(s)
 						},
+						'application/x-ndjson': {
+							schema: {
+								type: 'string',
+							},
+						},
 					},
 				},
+				// todo: non-2xx response
 			},
 		},
 	},