Gemfile in csl-1.2.3 vs Gemfile in csl-1.3.0

@@ -1,20 +1,26 @@
 source 'https://rubygems.org'
 gemspec
 
 group :development, :test do
   gem 'rake', '~>10.0'
-  gem 'rspec', '~>2.13'
+  gem 'rspec', '~>3.0'
   gem 'cucumber', '~>1.2'
   gem 'simplecov', '~>0.8', :require => false
   gem 'rubinius-coverage', :platform => :rbx
   gem 'coveralls', :require => false
 end
 
 group :debug do
-  gem 'ruby-debug', :require => false, :platforms => [:jruby]
-  gem 'debugger', :require => false, :platforms => [:mri]
+  if RUBY_VERSION >= '2.0'
+    gem 'byebug', :require => false, :platforms => :mri
+  else
+    gem 'debugger', :require => false, :platforms => :mri
+  end
+
+  gem 'ruby-debug', :require => false, :platforms => :jruby
+
   gem 'rubinius-debugger', :require => false, :platforms => :rbx
   gem 'rubinius-compiler', :require => false, :platforms => :rbx
 end
 
 group :optional do
@@ -22,17 +28,16 @@
 end
 
 group :extra do
   gem 'guard', '~>2.2'
   gem 'guard-rspec'
+  gem 'guard-cucumber'
   gem 'bond'
   gem 'diff-lcs'
   gem 'pry'
-  gem 'guard-cucumber'
-  gem 'rb-fsevent', '~>0.9', :platforms => [:ruby]
-
-  gem 'yard', '~>0.8', :platforms => [:mri]
-  gem 'redcarpet', '~>3.0', :platforms => [:mri]
+  gem 'rb-fsevent', '~>0.9', :platforms => :ruby
+  gem 'yard', '~>0.8', :platforms => :mri
+  gem 'redcarpet', '~>3.0', :platforms => :mri
 end
 
 group :rbx do
   platform :rbx do
     gem 'rubysl', '~>2.0'