Updated the Guard file.

Guardfile

@@ -1,17 +1,17 @@
 ##
-# To run the test suite against all 3 rubies: 1.9.2, 1.8.7 and REE, simply run the following command:
+# To run the test suite against all 4 rubies: 1.9.3, 1.9.2, 1.8.7 and REE, simply run the following command:
 # $ guard start
 #
 # Be use you are using RVM and have Ruby 1.9.2, 1.8.7 and REE installed as well as all
-# Backup's gem dependencies for each of these Ruby intepreters.
+# Backup"s gem dependencies for each of these Ruby intepreters.
 
-guard 'rspec',
+guard "rspec",
   :version => 2,
-  :rvm     => ['1.9.3', '1.9.2', '1.8.7', 'ree'],
+  :rvm     => ["1.9.3", "1.9.2", "1.8.7", "ree"],
   :bundler => true,
-  :cli     => '--color --format Fuubar' do
+  :cli     => "--color --format Fuubar" do
 
   watch(%r{^spec/.+_spec\.rb})
-  watch(%r{^lib/(.+)\.rb})     { 'spec' }
-  watch('spec/spec_helper.rb') { 'spec' }
+  watch(%r{^lib/(.+)\.rb})     { "spec" }
+  watch("spec/spec_helper.rb") { "spec" }
 end