bug#18221: Source of mit-scheme

[Mark H Weaver]

Andreas Enge <andr...@enge.fr> writes:

> On Sun, Aug 17, 2014 at 05:06:07PM +0200, Ludovic Courtès wrote:
>> Yes, I think that’s what’s needed, so OK to commit.
>
> Done with commit 68dddca.

That commit adds a top-level procedure 'source-directory' that is
specific to mit-scheme.  If it's kept at the top-level, it should
probably be renamed to something like 'mit-scheme-source-directory'.

Also, it would be good to line up the two calls to 'string-prefix?'.

    Thanks!
      Mark