Hi,

Regarding this conversation:
https://lists.gnu.org/archive/html/help-gnu-emacs/2022-06/msg00638.html

I have try to improve longlines-mode to detect more (and user settable)
breakpoints into long lines.  I have tested it on the file from the
cited conversation and a book (sentences with spaces) on one line.  It
seems to work for me but it might need more testing.

I'd like to prepare another patch afterward to be able to find
breakpoint past fill-column.  For example, the file from the
conversation fails to break after some lines because it contains
*really* long words.