https://github.com/Crowdtilt/CrowdtiltOpen/tree/08b3f56cb2020e1d0049d70ddd3ac149e87a40ee
https://github.com/rails/rails/tree/db045dbbf60b53dbe013ef25554fd013baf88134 こちら。4つのディレクトリに合計3万行。
https://github.com/cakephp/cakephp/tree/cd86555549ac17aeaa28abecaf450b49ce5ae663