Fix syntax error -- missing comma in _new_crowd.

app/views/devise/sessions/_new_crowd.html.haml

-= form_tag(omniauth_authorize_path(:user, :crowd), id: 'new_crowd_user' class: 'show-gl-field-errors') do
+= form_tag(omniauth_authorize_path(:user, :crowd), id: 'new_crowd_user', class: 'show-gl-field-errors') do
   .form-group
     = label_tag 'Username or email', for: :username
     = text_field_tag :username, nil, {class: "form-control top", title: "This field is required", autofocus: "autofocus", required: true }