Situation: I entered several functions while working with REPL in Emacs. Problem: There is junk like "; Evaluation aborted" when I'm simply saving buffer. What I want: clear descriptions of all the functions I entered in their latest revision.
Can I do that? Thanks.
I don't get it. Are you entering definitions at the REPL and expecting to recover them later? Just save a source file as you would in any other language. Use C-x 2 to split your Emacs window in two. Open a source file in one of them C-x C-f foo.lisp. Use C-c C-k, C-c C-r and friends (see SLIME menu) to compile / evaluate regions of your source code in the REPL.
I've looked for something like this in the past and have been unable to find it. You're best off writing all your definitions in a separate buffer and using SLIME's extensive evaluation/compilation functions (C-c C-k loads an entire file, C-x C-e evaluates the last expression, C-c C-r evaluates a region, etc.), only directly entering into the REPL things you don't want to save.
Um, C-x o or C-x b to get to the SLIME REPL buffer, then C-x w or C-x C-s to save it to a file. All the SLIME/CL stuff is a reader comment; you can either write a reader hack to reload the file treating the prompts as comments, or you can go through the file yourself to capture the pieces you want to save.
I agree that the best work flow method is to write your code in a separate buffer and evaluate in that, rather than enter the functions in the repl.
Assuming you have gone the repl way, I guess, C. Martin's solution to save the repl log and manually go through it are your only options.
If you entered the functions and vars into a separate package, you could go through the symbols in the package to help you decide what you want to keep.
E.g. to see all symbols created in the cl-user package:
(let ((p (find-package :cl-user)))
(loop
for s being the symbols in p
when (eq p (symbol-package s))
do (format t "~a~%" s)))