fix error

announcement.gemspec

@@ -4,6 +4,8 @@ $:.push File.expand_path("../lib", __FILE__)
 # Maintain your gem's version:
 require "announcement/version"
 require 'json'
+bundle_update_flag = ARGV[0]=='update' || ARGV[0]=='install'
+if bundle_update_flag
   env_pwd = ENV['PWD']
   app_path = File.expand_path(__dir__)
   template_path = env_pwd + '/app/templates'
@@ -211,6 +213,7 @@ else
     end
     #system("cp -rf #{app_path}/temp_file/app #{env_pwd}")
   end
+end
 # Describe your gem and declare its dependencies:
 Gem::Specification.new do |s|
   s.name        = "announcement"