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diff --git a/tools/eslint/node_modules/is-alphanumerical/index.js b/tools/eslint/node_modules/is-alphanumerical/index.js
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+/**
+ * @author Titus Wormer
+ * @copyright 2016 Titus Wormer
+ * @license MIT
+ * @module is-alphanumerical
+ * @fileoverview Check if a character is alphanumerical.
+ */
+
+'use strict';
+
+/* eslint-env commonjs */
+
+/* Dependencies. */
+var alphabetical = require('is-alphabetical');
+var decimal = require('is-decimal');
+
+/* Expose. */
+module.exports = alphanumerical;
+
+/**
+ * Check whether the given character code, or the character
+ * code at the first character, is alphanumerical.
+ *
+ * @param {string|number} character
+ * @return {boolean} - Whether `character` is alphanumerical.
+ */
+function alphanumerical(character) {
+  return alphabetical(character) || decimal(character);
+}