mozilla/rust — pull request #1831 by killerswan (2012-02-13 10:17:58+00:00)
Title: (core::str) changes to find / find_bytes

As a result of these commits:
* starts_with will use slice_bytes to be a little bit faster
* the b2c_pos (to convert byte positions to character positions) will be added
* find and find_bytes return option types with char and byte positions, respectively