Gemfile in citeproc-ruby-1.0.4 vs Gemfile in citeproc-ruby-1.0.5

@@ -7,19 +7,19 @@
 group :development, :test do
   gem 'rake', '~>10.0'
   gem 'rspec', '~>3.0'
   gem 'cucumber', '~>1.2'
   gem 'simplecov', '~>0.8'
-  gem 'rubinius-coverage', :platforms => [:rbx]
+  gem 'rubinius-coverage', :platforms => :rbx
   gem 'coveralls', :require => false
 end
 
 group :debug do
-  gem 'ruby-debug', :require => false, :platforms => [:jruby]
-  gem 'debugger', :require => false, :platforms => [:mri]
-  gem 'rubinius-debugger', :require => false, :platforms => [:rbx]
-  gem 'rubinius-compiler', :require => false, :platforms => [:rbx]
+  gem 'ruby-debug', :require => false, :platforms => :jruby
+  gem 'debugger', :require => false, :platforms => :mri_19
+  gem 'rubinius-debugger', :require => false, :platforms => :rbx
+  gem 'rubinius-compiler', :require => false, :platforms => :rbx
 end
 
 group :optional do
 	gem 'edtf'
 	gem 'chronic'
@@ -29,11 +29,11 @@
   gem 'guard', '~>2.2'
   gem 'guard-rspec'
   gem 'guard-cucumber'
   gem 'rb-fsevent', '~>0.9.1'
   gem 'pry'
-	gem 'yard', '~>0.8', :platforms => [:mri]
-	gem 'redcarpet', '~>3.0', :platforms => [:mri]
+	gem 'yard', '~>0.8', :platforms => :mri
+	gem 'redcarpet', '~>3.0', :platforms => :mri
 end
 
 platform :rbx do
   gem 'rubysl'
   gem 'racc'