imap-backup.gemspec in imap-backup-4.0.0 vs imap-backup.gemspec in imap-backup-4.0.1

@@ -1,31 +1,31 @@
 $LOAD_PATH.unshift(File.expand_path("lib", __dir__))
 require "imap/backup/version"
-require "rake/file_list"
 
 Gem::Specification.new do |gem|
   gem.name          = "imap-backup"
   gem.description   = "Backup GMail, or any other IMAP email service, to disk."
   gem.summary       = "Backup GMail (or other IMAP) accounts to disk"
   gem.authors       = ["Joe Yates"]
   gem.email         = ["[e-mail]"]
   gem.homepage      = "https://github.com/joeyates/imap-backup"
   gem.licenses      = ["MIT"]
+  gem.version       = Imap::Backup::VERSION
 
-  # Build list of files manually, see also
-  # https://github.com/rubygems/rubygems/blob/master/bundler/bundler.gemspec#L37
   gem.files         = %w[bin/imap-backup]
-  gem.files         += Dir.glob("docs/*{.png,.md}")
+  gem.files         += Dir.glob("docs/*.md")
   gem.files         += Dir.glob("lib/**/*.rb")
-  gem.files         += Dir.glob("spec/**/*{.rb,.yml}")
   gem.files         += %w[imap-backup.gemspec]
   gem.files         += %w[LICENSE README.md]
 
+  gem.extra_rdoc_files += Dir.glob("README.md")
+  gem.extra_rdoc_files += Dir.glob("docs/*.md")
+  gem.rdoc_options = ["--main", "README.md"]
+
   gem.executables   = gem.files.grep(%r{^bin/}).map { |f| File.basename(f) }
-  gem.test_files    = gem.files.grep(%r{^spec/})
+  gem.test_files    = Dir.glob("spec/**/*{.rb,.yml}")
   gem.require_paths = ["lib"]
   gem.required_ruby_version = ">= 2.5"
-  gem.version = Imap::Backup::VERSION
 
   gem.add_runtime_dependency "highline"
   gem.add_runtime_dependency "mail"
   gem.add_runtime_dependency "rake"
   gem.add_runtime_dependency "thor", "~> 1.1"