style(nodeTree): fix formatting

the formatting was messed up due to https://github.com/angular/clang-format/issues/7.

I replaced the fat arrow function with regular function expression to resolve the formatting issue

tools/broccoli/trees/node_tree.ts

@@ -106,7 +106,7 @@ module.exports = function makeNodeTree(destinationPath) {
       match: /$/g,
       replacement: ""
     }],
-    replaceWithPath: (path, content) => {
+    replaceWithPath: function(path, content) {
       if (!path.endsWith('.d.ts')) {
         content += '\r\nexport var __esModule = true;\n';
       }
@@ -137,5 +137,4 @@ nodeTree = mergeTrees([nodeTree, typescriptTree, docs, packageJsons]);
   nodeTree = stew.mv(nodeTree, '');
 
   return destCopy(nodeTree, destinationPath);
-}
-;
+};