rust-lang/rust — pull request #19594 by Arcterus (2014-12-06 10:53:36+00:00)
Title: serialize: base64: allow LF in addition to CRLF and optimize slightly

It is useful to have configurable newlines in base64 as the standard
leaves that for the implementation to decide. GNU `base64` apparently
uses LF, which meant in `uutils` we had to manually convert the CRLF to
LF. This made the program very slow for large inputs.

[breaking-change]