Start line numbering at 1 when acting on entire file

When acting on the entire file, line numbering should start at 1 for consistency with other programs and usage of act on partial files.

Here's an example of the bug (see line 7):

![screen shot 2014-04-04 at 2 44 18 pm](https://cloud.githubusercontent.com/assets/6197/2620669/54c5a908-bc42-11e3-9816-eeca6c4d15f9.png)