//! Utilities for iterating readers efficiently line-by-line over
//! ASCII or UTF-8 encoded text content. Lines are identified by a
//! LINE-FEED, i.e. a byte with the value ```\x0A```. Content at the
//! end of a stream will be considered as a line - no matter whether
//! it was termined by a line-feed or not.
//!
//! Efficiency is achieved by two limitations:
//!
//! * The provided utilities avoid allocation of memory for each
//! identified line by reusing internal buffers. Clients are
//! supposed to make their own copy of a line if it needs to be
//! remembered for later use in the program.
//!
//! * The provided utilities do not validate proper encoding of the
//! input data, and leave this up to the client.