(mime-product-name): Use <(` ...)> and <(, ...)> instead of <`> and

(mime-product-name): Use <(` ...)> and <(, ...)> instead of <`> and
<,>.
(mime-product-version): Likewise.
(mime-product-code-name): Likewise.
(mime-library-version): Use <(function ...)> instead of <#'...>.
(mm-expand-class-name): Use <(` ...)> and <(, ...)> instead of <`> and
<,>.
(mm-define-backend): Likewise.
(mm-define-method): Use <(` ...)>, <(, ...)> and <(,@ ...)> instead of
<`>, <,> and <,@>.
(mel-define-service): Likewise.
(mel-define-backend): Use <(` ...)> and <(, ...)> instead of <`> and
<,>.
(mel-define-method-function): Likewise.
(mel-define-function): Likewise.