Refactor code-style

lib/index.js

@@ -3,33 +3,36 @@
  * @typedef {import('unist').Node} Node
  *
  * @typedef ProxyFields
- * @property {Parent|null} parent
+ *   Extra fields found in a proxied node.
+ * @property {Parent | null} parent
  *   Parent link (or `null` for the root).
  * @property {Node} node
  *   Link to the original node
  *
  * @typedef {Node & ProxyFields} Proxy
- *   Proxied node
+ *   Proxied node.
  */
 
 /** @type {WeakMap<Node, Proxy>} */
 const cache = new WeakMap()
 
 /**
- * @param {Node} node
+ * Add parent references to a proxy of `tree`.
+ *
+ * @param {Node} tree
  *   Create a proxy of `node` that acts like the original tree upon reading, but
  *   each proxied node has a reference to its parent node.
  * @returns {Proxy}
  *   Proxy of `node`.
  */
-export function parents(node) {
-  return wrapNode(node, null)
+export function parents(tree) {
+  return wrapNode(tree, null)
 }
 
 /**
  * @param {Node} node
  *   Node to wrap.
- * @param {Parent|null} parent
+ * @param {Parent | null} parent
  *   Parent of `node`.
  * @returns {Proxy}
  *   Proxy of `node`.