indent-write

Nestable wrappers for fmt::Write and io::Write that perform indentation for you

lib.rs:

Simple indentation adapters for io::Write, fmt::Write, and Display. Each adapter wraps a writer or writable object, and inserts an indentation at the front of each non-empty line.

See fmt::IndentWriter, io::IndentWriter, and indentable::Indentable for examples.