[m-rev.] for post-commit review: transition guide improvements

[Zoltan Somogyi]

I forgot to commit this a long time ago.

For review (and edit) by anyone.

Zoltan.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: DIFF.tg
Type: application/octet-stream
Size: 8354 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20160904/f246c370/attachment.obj>