3 files changed, 14 insertions, 8 deletions
diff --git a/nuldoc-src/command.ts b/nuldoc-src/command.ts
index 47b8ee0..dd15a77 100644
--- a/nuldoc-src/command.ts
+++ b/nuldoc-src/command.ts
@@ -146,7 +146,10 @@ async function copyStaticFiles(config: Config) {
   const globPattern = joinGlobs([Deno.cwd(), config.locations.staticDir, "*"]);
   for await (const entry of expandGlob(globPattern)) {
     const src = entry.path;
-    const dst = src.replace(config.locations.staticDir, config.locations.destDir);
+    const dst = src.replace(
+      config.locations.staticDir,
+      config.locations.destDir,
+    );
     await Deno.copyFile(src, dst);
   }
 }
diff --git a/nuldoc-src/docbook/to_html.ts b/nuldoc-src/docbook/to_html.ts
index 6788158..64d3492 100644
--- a/nuldoc-src/docbook/to_html.ts
+++ b/nuldoc-src/docbook/to_html.ts
@@ -192,6 +192,8 @@ function transformProgramListingElement(doc: Document) {
     }
 
     n.name = "pre";
+    const preClass = n.attributes.get("class");
+    n.attributes.set("class", preClass ? preClass + " highlight" : "highlight");
     const codeElement: Element = {
       kind: "element",
       name: "code",
@@ -209,12 +211,13 @@ function transformLiteralLayoutElement(doc: Document) {
     }
 
     n.name = "pre";
-    const children = n.children;
+    const preClass = n.attributes.get("class");
+    n.attributes.set("class", preClass ? preClass + " highlight" : "highlight");
     const codeElement: Element = {
       kind: "element",
       name: "code",
       attributes: new Map(),
-      children: children,
+      children: n.children,
     };
     n.children = [codeElement];
   });
diff --git a/nuldoc-src/html.ts b/nuldoc-src/html.ts
index d127d29..2832490 100644
--- a/nuldoc-src/html.ts
+++ b/nuldoc-src/html.ts
@@ -132,11 +132,11 @@ function textNodeToHtmlText(t: Text, ctx: Context): string {
 }
 
 function encodeSpecialCharacters(s: string): string {
-  return s.replaceAll(/&(?!\w+;)/g, '&amp;')
-    .replaceAll(/</g, '&lt;')
-    .replaceAll(/>/g, '&gt;')
-    .replaceAll(/'/g, '&apos;')
-    .replaceAll(/"/g, '&quot;');
+  return s.replaceAll(/&(?!\w+;)/g, "&amp;")
+    .replaceAll(/</g, "&lt;")
+    .replaceAll(/>/g, "&gt;")
+    .replaceAll(/'/g, "&apos;")
+    .replaceAll(/"/g, "&quot;");
 }
 
 function elementNodeToHtmlText(e: Element, ctx: Context): string {