Homepage: https://www.gnu.org/software/emacs
Author: Simon Josefsson
Interpret RFC2646 "flowed" text
This implement decoding of RFC2646 formatted text, including the quoted-depth wins rules. Theory of operation: search for lines ending with SPC, save quote length of line, remove SPC and concatenate line with the following line if quote length of following line matches current line. When no further concatenations are possible, we've found a paragraph and we let `fill-region' fill the long line into several lines with the quote prefix as `fill-prefix'. Todo: implement basic `fill-region'