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To activate SLIME put the following code into ~/.emacs:
(setq inferior-lisp-program "PATH_TO_YOUR_LISP_BINARY")
(add-to-list 'load-path "%%SLIME_LISPDIR%%"
        "%%SLIME_LISPDIR%%/contrib")
(require 'slime)
(slime-setup '(slime-repl))
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