[PATCH] eval.c (evaluate_subexp_standard): Add some comments.

[Doug Evans]

On Thu, Apr 17, 2014 at 1:15 PM, Doug Evans <dje@google.com> wrote:
> Hi.
>
> Reading this part of evaluate_subexp_standard was harder than
> it could be (for me anyway).
>
> 2014-04-17  Doug Evans  <dje@google.com>
>
>         * eval.c (evaluate_subexp_standard): Add some comments.

Committed.