EllisLab/CodeIgniter — pull request #2649 by richardkmiller (2013-09-18 18:24:22+00:00)
Title: Display the name of each view in development mode

Because any given page might load as many as a dozen views or template files, it's helpful to know which markup belongs to which template. You can view source for a given page and immediately see where markup originates. Only applies when ENVIRONMENT == development.