gemspec error on creating new rails engine

I am trying to create rails engine using the below link: http://guides.rubyonrails.org/engines.html I have received below errors You have one or more invalid gemspecs that need to be fixed. The gemspec at /home/shariq/Documents/plugin/blorgh/blorgh.gemspec is not valid. Please fix this gemspec. The validation error was `'"FIXME" or "TODO" is not a description'` I already tried bundle update and bundle install Here is all myworking log ``` shariq@SDEV-MACHINE:~/Documents/plugin$ ruby -v ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux] shariq@SDEV-MACHINE:~/Documents/plugin$ rails -v Rails 5.0.0.1 shariq@SDEV-MACHINE:~/Documents/plugin$ mysql --version mysql Ver 14.14 Distrib 5.7.15, for Linux (x86_64) using EditLine wrapper shariq@SDEV-MACHINE:~/Documents/plugin$ rails plugin new blorgh --mountable -d mysql create create README.md create Rakefile create blorgh.gemspec create MIT-LICENSE create .gitignore create Gemfile create app create app/controllers/blorgh/application_controller.rb create app/helpers/blorgh/application_helper.rb create app/jobs/blorgh/application_job.rb create app/mailers/blorgh/application_mailer.rb create app/models/blorgh/application_record.rb create app/views/layouts/blorgh/application.html.erb create app/assets/images/blorgh create app/assets/images/blorgh/.keep create config/routes.rb create lib/blorgh.rb create lib/tasks/blorgh_tasks.rake create lib/blorgh/version.rb create lib/blorgh/engine.rb create app/assets/config/blorgh_manifest.js create app/assets/stylesheets/blorgh/application.css create app/assets/javascripts/blorgh/application.js create bin/rails create test/test_helper.rb create test/blorgh_test.rb append Rakefile create test/integration/navigation_test.rb vendor_app test/dummy run bundle install You have one or more invalid gemspecs that need to be fixed. The gemspec at /home/shariq/Documents/plugin/blorgh/blorgh.gemspec is not valid. Please fix this gemspec. The validation error was '"FIXME" or "TODO" is not a description' shariq@SDEV-MACHINE:~/Documents/plugin$ ``` here is gemspec file: ``` ##### log ####### $:.push File.expand_path("../lib", __FILE__) require "blorgh/version" Gem::Specification.new do |s| s.name = "blorgh" s.version = Blorgh::VERSION s.authors = ["Shariq"] s.email = ["gr8shariq@live.com"] s.homepage = "TODO" s.summary = "TODO: Summary of Blorgh." s.description = "TODO: Description of Blorgh." s.license = "MIT" s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"] s.add_dependency "rails", "~> 5.0.0", ">= 5.0.0.1" end ```