"Tobias C. Rittweiler" tcr@freebits.de writes:
SWANK-BACKEND::WARN-UNIMPLEMENTED-INTERFACES does correct filling in SBCL and CMUCL. It does not do any filling on CCL. The filling on Clisp is suboptimal.
I replied in IRC, but in case it didn't get noticed:
*print-pretty* by default in ccl is nil, and when bound to T it behaves like sbcl.
It seems that clisp respects terminal width and does pprint-newline according to it, while ccl and sbcl do this with respect to 80 characters. And clisp screws terminal width when running inside emacs.