Fix the wrong identation. (#132)

Author: dixpac

Diff for: lib/tailwindcss/engine.rb

@@ -10,8 +10,8 @@ class Engine < ::Rails::Engine
       Rails.application.config.generators.stylesheets = false
     end
 
-     config.app_generators do |g|
-       g.template_engine :tailwindcss
-     end
+    config.app_generators do |g|
+      g.template_engine :tailwindcss
+    end
   end
 end