(luna-find-class): Use <(` ...)> and <(, ...)> instead of <`> and <,>.

(luna-find-class): Use <(` ...)> and <(, ...)> instead of <`> and <,>.
(luna-set-class): Likewise.
(luna-class-obarray): Likewise.
(luna-class-parents): Likewise.
(luna-class-number-of-slots): Likewise.
(luna-define-class): Likewise.
(luna-class-slot-index): Likewise.
(luna-slot-index): Likewise.
(luna-define-method): Use <(` ...)>, <(, ...)> and <(,@ ...)> instead
of <`>, <,> and <,@>.
(luna-find-functions): Use <(` ...)> and <(, ...)> instead of <`> and
<,>.
(luna-class-name): Likewise.
(luna-set-class-name): Likewise.
(luna-get-obarray): Likewise.
(luna-set-obarray): Likewise.
(luna-make-entity): Use <(function ...)> instead of <#'...>.