Replace google closure syntax = with brackets around name

src/ol/structs/LRUCache.js

@@ -23,7 +23,7 @@ import {assert} from '../asserts.js';
  */
 class LRUCache {
   /**
-   * @param {number=} opt_highWaterMark High water mark.
+   * @param {number} [opt_highWaterMark] High water mark.
    */
   constructor(opt_highWaterMark) {
     /**
@@ -100,7 +100,7 @@ class LRUCache {
 
   /**
    * @param {string} key Key.
-   * @param {*=} opt_options Options (reserverd for subclasses).
+   * @param {*} [opt_options] Options (reserverd for subclasses).
    * @return {T} Value.
    */
   get(key, opt_options) {

src/ol/structs/LinkedList.js

@@ -15,7 +15,7 @@
  */
 class LinkedList {
   /**
-   * @param {boolean=} opt_circular The last item is connected to the first one,
+   * @param {boolean} [opt_circular] The last item is connected to the first one,
    * and the first item to the last one. Default is true.
    */
   constructor(opt_circular) {

src/ol/structs/RBush.js

@@ -24,7 +24,7 @@ import {isEmpty} from '../obj.js';
  */
 class RBush {
   /**
-   * @param {number=} opt_maxEntries Max entries.
+   * @param {number} [opt_maxEntries] Max entries.
    */
   constructor(opt_maxEntries) {
     /**
@@ -198,7 +198,7 @@ class RBush {
   }
 
   /**
-   * @param {import("../extent.js").Extent=} opt_extent Extent.
+   * @param {import("../extent.js").Extent} [opt_extent] Extent.
    * @return {import("../extent.js").Extent} Extent.
    */
   getExtent(opt_extent) {