Updated i18n spec

Using single quotes

spec/api/i18n_spec.rb

-require "spec_helper"
+require 'spec_helper'
 
-describe "i18n" do
+describe 'i18n' do
 
   before(:each) { set_api_key_header }
 
-  it "should respect the Accept-Language header" do
-    put "/api/v1/comments/does_not_exist/votes", {}, {"HTTP_ACCEPT_LANGUAGE" => "x-test"}
+  it 'should respect the Accept-Language header' do
+    put '/api/v1/comments/does_not_exist/votes', {}, {'HTTP_ACCEPT_LANGUAGE' => 'x-test'}
     last_response.status.should == 400
-    parse(last_response.body).first.should == "##x-test## requested object not found"
+    parse(last_response.body).first.should == '##x-test## requested object not found'
   end
 end