Major mode for typing and evaluating Lisp forms.
Like Lisp mode except that M-x eval-print-last-sexp evals the Lisp expression
before point, and prints its value into the buffer, advancing point.
Note that printing is controlled by `eval-expression-print-length'
Delete converts tabs to spaces as it moves back.
Paragraphs are separated only by blank lines.
Semicolons start comments.
ESC Prefix Command
(that binding is currently shadowed by another mode)
Entry to this mode calls the value of `lisp-interaction-mode-hook' if that value is non-nil.