[m-rev.] for review: separate type_details_sub from type_details_du

[Zoltan Somogyi]

For review by Peter.

Zoltan.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Log.sub
Type: application/octet-stream
Size: 2478 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20211002/2db295a3/attachment-0002.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: DIFF.sub
Type: application/octet-stream
Size: 92112 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20211002/2db295a3/attachment-0003.obj>