docs(regexp): update module example to get full jsr score (#4796)

regexp/escape.ts

@@ -1,6 +1,24 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 // This module is browser compatible.
 
+/**
+ * This module contains functions to escape strings for use in regular expressions.
+ *
+ * @example
+ * ```ts
+ * import { escape } from "@std/regexp/escape";
+ * import { assertEquals, assertMatch, assertNotMatch } from "@std/assert";
+ *
+ * const re = new RegExp(`^${escape(".")}$`, "u");
+ *
+ * assertEquals("^\\.$", re.source);
+ * assertMatch(".", re);
+ * assertNotMatch("a", re);
+ * ```
+ *
+ * @module
+ */
+
 // // For future forward-compatibility with regexp `v` flag, reservedCharMap is
 // // autogenerated from the ClassSetReservedDoublePunctuator,
 // // ClassSetSyntaxCharacter, and ClassSetReservedPunctuator categories in the
@@ -27,7 +45,7 @@ const reservedCharMap = {
   "&": "\\x26",
   "!": "\\x21",
   "#": "\\x23",
-  "$": "\\$",
+  $: "\\$",
   "%": "\\x25",
   "*": "\\*",
   "+": "\\+",

regexp/mod.ts

@@ -7,6 +7,18 @@
  * such as escaping text for interpolation into a regexp.
  *
  * @module
+ *
+ * @example
+ * ```ts
+ * import { escape } from "@std/regexp";
+ * import { assertEquals, assertMatch, assertNotMatch } from "@std/assert";
+ *
+ * const re = new RegExp(`^${escape(".")}$`, "u");
+ *
+ * assertEquals("^\\.$", re.source);
+ * assertMatch(".", re);
+ * assertNotMatch("a", re);
+ * ```
  */
 
 export * from "./escape.ts";