fix

book/node_modules/highlight.js/es/languages/dust.js

@@ -0,0 +1,47 @@
+/*
+Language: Dust
+Requires: xml.js
+Author: Michael Allen <michael.allen@benefitfocus.com>
+Description: Matcher for dust.js templates.
+Website: https://www.dustjs.com
+Category: template
+*/
+
+/** @type LanguageFn */
+function dust(hljs) {
+  const EXPRESSION_KEYWORDS = 'if eq ne lt lte gt gte select default math sep';
+  return {
+    name: 'Dust',
+    aliases: [ 'dst' ],
+    case_insensitive: true,
+    subLanguage: 'xml',
+    contains: [
+      {
+        className: 'template-tag',
+        begin: /\{[#\/]/,
+        end: /\}/,
+        illegal: /;/,
+        contains: [
+          {
+            className: 'name',
+            begin: /[a-zA-Z\.-]+/,
+            starts: {
+              endsWithParent: true,
+              relevance: 0,
+              contains: [ hljs.QUOTE_STRING_MODE ]
+            }
+          }
+        ]
+      },
+      {
+        className: 'template-variable',
+        begin: /\{/,
+        end: /\}/,
+        illegal: /;/,
+        keywords: EXPRESSION_KEYWORDS
+      }
+    ]
+  };
+}
+
+export { dust as default };