Generate temporary file/directory names and temporary file/directory structures for writing tests.
Like underscore for Node streams. Functions for iterating over object mode streams: forEach, map, mapKey, reduce, filter, fromArray, toArray, fromAsync, devnull, pipe, head, tail, through, thru, writable, readable, duplex, pipeline.
Utility functions for processing markdown files using object mode streams. Used by markdown-styles and by ghost-render.