Prettify more of the JavaScript code

Author: marco-c

frontend/src/common.js

@@ -243,7 +243,16 @@ export function filterLanguages(files) {
     "inc"
   ];
   const js = isEnabled("js");
-  const jsExtensions = ["js", "jsm", "mjs", "jsx", "xml", "xul", "xhtml", "html"];
+  const jsExtensions = [
+    "js",
+    "jsm",
+    "mjs",
+    "jsx",
+    "xml",
+    "xul",
+    "xhtml",
+    "html"
+  ];
   const java = isEnabled("java");
   const javaExtensions = ["java"];
   const rust = isEnabled("rust");