unlines package:streamly-core

Flattens the stream of Array Char, after appending a terminating newline to each string. unlines is an inverse operation to lines.
>>> Stream.fold Fold.toList $ Unicode.unlines $ Stream.fromList ["lines", "this", "string"]
"lines\nthis\nstring\n"
unlines = S.unlines A.read
Note that, in general
unlines . lines /= id
Unfold a stream to character streams using the supplied Unfold and concat the results suffixing a newline character \n to each stream. Definition:
>>> unlines = Stream.unfoldEachEndBy '\n'

>>> unlines = Stream.unfoldEachEndBySeq "\n" Unfold.fromList
Pre-release