I'm not sure if there is any official story, but it is clearly somebody messing up with `vim` on the production servers. They've tried to go into insert mode, f

I'm not sure if there is any official story, but it is clearly somebody messing up with `vim` on the production servers. They've tried to go into insert mode, failed, and not realised their mistake until after they've written the file. If I remember correctly, this output was the response to every tumblr request for about 15 minutes before anybody noticed and fixed it. i?php