Re: Recent change of lm-with-file in emacs-lisp/lisp-mnt.el.

[Richard Stallman]

    Isn't it bad to refer to BODY twice?

It is not bad if only one of them will be executed in any given
execution of the macro expansion.  It is a little wasteful,
but that's not worth worrying about here.

>From the manual:

    @node Argument Evaluation
    @subsection Evaluating Macro Arguments Repeatedly

      When defining a macro you must pay attention to the number of times
    the arguments will be evaluated when the expansion is executed.