add line wrapping for code

views/file.html

@@ -5,6 +5,10 @@
   <style>
     // prettier-ignore
     {{.css}}
+    pre {
+      white-space: pre-wrap;
+      word-wrap: break-word;
+    }
   </style>
   <div class="downloadParent">
     <a href="/{{.fullname}}" class="button">Back to {{.fullname}}</a>