fix missing jsdoc directives

Author: mbostock

src/marks/auto.js

@@ -13,6 +13,7 @@ import {group, groupX, groupY} from "../transforms/group.js";
 import {marks} from "../mark.js";
 import {ascending} from "d3";
 
+/** @jsdoc auto */
 export function auto(data, {x, y, color, size, fx, fy, mark} = {}) {
   // Allow x and y and other dimensions to be specified as shorthand field names
   // (but note that they can also be specified as a {transform} object such as

src/marks/axis.js

@@ -37,11 +37,13 @@ function anchorFx(options) {
   return maybeAnchor(options, ["top", "bottom"]);
 }
 
+/** @jsdoc axisY */
 export function axisY() {
   const [data, options] = maybeData(...arguments);
   return axisKy("y", anchorY(options), data, options);
 }
 
+/** @jsdoc axisFy */
 export function axisFy() {
   const [data, options] = maybeData(...arguments);
   return axisKy("fy", anchorFy(options), data, options);
@@ -53,6 +55,7 @@ export function axisX() {
   return axisKx("x", anchorX(options), data, options);
 }
 
+/** @jsdoc axisFx */
 export function axisFx() {
   const [data, options] = maybeData(...arguments);
   return axisKx("fx", anchorFx(options), data, options);