gen: fix indentation in app.js

closes expressjs#65

templates/js/app.js

@@ -27,33 +27,33 @@ app.use('/users', users);
 
 // catch 404 and forward to error handler
 app.use(function(req, res, next) {
-    var err = new Error('Not Found');
-    err.status = 404;
-    next(err);
+  var err = new Error('Not Found');
+  err.status = 404;
+  next(err);
 });
 
 // error handlers
 
 // development error handler
 // will print stacktrace
 if (app.get('env') === 'development') {
-    app.use(function(err, req, res, next) {
-        res.status(err.status || 500);
-        res.render('error', {
-            message: err.message,
-            error: err
-        });
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+      message: err.message,
+      error: err
     });
+  });
 }
 
 // production error handler
 // no stacktraces leaked to user
 app.use(function(err, req, res, next) {
-    res.status(err.status || 500);
-    res.render('error', {
-        message: err.message,
-        error: {}
-    });
+  res.status(err.status || 500);
+  res.render('error', {
+    message: err.message,
+    error: {}
+  });
 });