While RDM's quick test is encouraging, I think one of the key things is
going to be developing tests for the various cases:

- binary mode, single byte line ending
- binary mode, multi-byte line ending
- text mode, single byte single char line ending*
- text mode, multi-byte single char line ending
- text mode, multiple char line ending

The text mode tests would need to cover a variety of encodings (e.g.
ASCII, latin-1, UTF-8, UTF-16, UTF-32 and maybe something like koi8-r
and/or some of the CJK codecs).

*if applicable to codec under test