[MERGE] Change the `bzr init-repo` default to --trees (#53483)

[Jelmer Vernooij]

Jelmer Vernooij has voted +1.
Status is now: Approved
Comment:
Despite the concerns, I think it looks ok.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C20070202170420.GC6165%40larstiq.dyndns.org%3E