uutils/coreutils — pull request #118 by Arcterus (2014-02-27 19:04:26+00:00)
Title: Implement tac (closes #117)

One thing that I noticed is that GNU ```tac``` appears to have a bug. I used ```tac -b tac/tac.rs```, and GNU ```tac``` **skipped** one of the blank lines. I did not implement that bug, because that would be ridiculous.

```--regex``` is not implemented for lack of a regex engine in the standard Rust distribution.