Neat and tidy, I say

activemodel/activemodel.gemspec

-version = File.read(File.expand_path("../../RAILS_VERSION", __FILE__)).strip
+version = File.read(File.expand_path('../../RAILS_VERSION', __FILE__)).strip
 
 Gem::Specification.new do |s|
   s.platform    = Gem::Platform::RUBY
@@ -6,14 +6,15 @@
   s.version     = version
   s.summary     = 'A toolkit for building modeling frameworks (part of Rails).'
   s.description = 'A toolkit for building modeling frameworks like Active Record and Active Resource. Rich support for attributes, callbacks, validations, observers, serialization, internationalization, and testing.'
+
   s.required_ruby_version = '>= 1.8.7'
 
-  s.author            = "David Heinemeier Hansson"
-  s.email             = "david@loudthinking.com"
-  s.homepage          = "http://www.rubyonrails.org"
-  s.rubyforge_project = "activemodel"
+  s.author            = 'David Heinemeier Hansson'
+  s.email             = 'david@loudthinking.com'
+  s.homepage          = 'http://www.rubyonrails.org'
+  s.rubyforge_project = 'activemodel'
 
-  s.files        = Dir["CHANGELOG", "MIT-LICENSE", "README", "lib/**/*"]
+  s.files        = Dir['CHANGELOG', 'MIT-LICENSE', 'README', 'lib/**/*']
   s.require_path = 'lib'
 
   s.has_rdoc = true

activerecord/activerecord.gemspec

@@ -6,6 +6,7 @@
   s.version     = version
   s.summary     = 'Object-relational mapper framework (part of Rails).'
   s.description = 'Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in.'
+
   s.required_ruby_version = '>= 1.8.7'
 
   s.author            = 'David Heinemeier Hansson'

activeresource/activeresource.gemspec

@@ -6,6 +6,7 @@
   s.version     = version
   s.summary     = 'REST modeling framework (part of Rails).'
   s.description = 'REST on Rails. Wrap your RESTful web app with Ruby classes and work with them like Active Record models.'
+
   s.required_ruby_version = '>= 1.8.7'
 
   s.author            = 'David Heinemeier Hansson'

activesupport/activesupport.gemspec

@@ -6,6 +6,7 @@
   s.version     = version
   s.summary     = 'A toolkit of support libraries and Ruby core extensions extracted from the Rails framework.'
   s.description = 'A toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Rich support for multibyte strings, internationalization, time zones, and testing.'
+
   s.required_ruby_version = '>= 1.8.7'
 
   s.author            = 'David Heinemeier Hansson'

rails.gemspec

@@ -6,7 +6,8 @@
   s.version     = version
   s.summary     = 'Full-stack web application framework.'
   s.description = 'Ruby on Rails is a full-stack web framework optimized for programmer happiness and sustainable productivity. It encourages beautiful code by favoring convention over configuration.'
-  s.required_ruby_version = '>= 1.8.7'
+
+  s.required_ruby_version     = '>= 1.8.7'
   s.required_rubygems_version = ">= 1.3.6"
 
   s.author            = 'David Heinemeier Hansson'
@@ -17,11 +18,11 @@
   s.files = []
   s.require_path = []
 
-  s.add_dependency('activesupport',    version)
-  s.add_dependency('actionpack',       version)
-  s.add_dependency('activerecord',     version)
-  s.add_dependency('activeresource',   version)
-  s.add_dependency('actionmailer',     version)
-  s.add_dependency('railties',         version)
-  s.add_dependency('bundler',          '>= 0.9.14')
+  s.add_dependency('activesupport',  version)
+  s.add_dependency('actionpack',     version)
+  s.add_dependency('activerecord',   version)
+  s.add_dependency('activeresource', version)
+  s.add_dependency('actionmailer',   version)
+  s.add_dependency('railties',       version)
+  s.add_dependency('bundler',        '>= 0.9.14')
 end