use spec instead of gem

atig.gemspec

@@ -1,29 +1,29 @@
 # -*- encoding: utf-8 -*-
 require File.expand_path('../lib/atig/version', __FILE__)
 
-Gem::Specification.new do |gem|
-  gem.name          = "atig"
-  gem.version       = Atig::VERSION
-  gem.authors       = ["MIZUNO Hiroki", "SHIBATA Hiroshi", ]
-  gem.email         = ["mzp@ocaml.jp", "shibata.hiroshi@gmail.com"]
+Gem::Specification.new do |spec|
+  spec.name          = "atig"
+  spec.version       = Atig::VERSION
+  spec.authors       = ["MIZUNO Hiroki", "SHIBATA Hiroshi", ]
+  spec.email         = ["mzp@ocaml.jp", "shibata.hiroshi@gmail.com"]
 
-  gem.summary       = %q{Atig.rb is forked from cho45's tig.rb. We improve some features of tig.rb.}
-  gem.description   = %q{Atig.rb is Twitter Irc Gateway.}
-  gem.homepage      = "https://github.com/atig/atig"
+  spec.summary       = %q{Atig.rb is forked from cho45's tig.rb. We improve some features of tig.rb.}
+  spec.description   = %q{Atig.rb is Twitter Irc Gateway.}
+  spec.homepage      = "https://github.com/atig/atig"
 
-  gem.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  gem.bindir        = "exe"
-  gem.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
-  gem.require_paths = ["lib"]
-  gem.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-  gem.required_ruby_version = Gem::Requirement.new(">= 1.9.3")
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+  spec.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  spec.required_ruby_version = Gem::Requirement.new(">= 1.9.3")
 
-  gem.add_dependency 'sqlite3', ['>= 1.3.2']
-  gem.add_dependency 'net-irc', ['>= 0']
-  gem.add_dependency 'oauth', ['>= 0']
-  gem.add_dependency 'twitter-text', ['~> 1.7.0']
+  spec.add_dependency 'sqlite3', ['>= 1.3.2']
+  spec.add_dependency 'net-irc', ['>= 0']
+  spec.add_dependency 'oauth', ['>= 0']
+  spec.add_dependency 'twitter-text', ['~> 1.7.0']
 
-  gem.add_development_dependency 'bundler'
-  gem.add_development_dependency 'rake'
-  gem.add_development_dependency 'coveralls'
+  spec.add_development_dependency 'bundler'
+  spec.add_development_dependency 'rake'
+  spec.add_development_dependency 'coveralls'
 end