[m-rev.] for review: filename extensions

[Zoltan Somogyi]

For review by anyone. I have bootchecked this in C# and Java grades
as well as C grades.

Zoltan.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Log.ext
Type: application/octet-stream
Size: 3481 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20200813/2fb8d60c/attachment-0002.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: DIFF.ext
Type: application/octet-stream
Size: 204083 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20200813/2fb8d60c/attachment-0003.obj>