Proposal: make hg up update to @ if was absent

[David Demelier]

Hello,

I like to use bookmarks for short-lived developments. I usually set 
bookmarks on code which may break existing features or similar. But I 
also want that a default bookmark exists so that "normal" users are not 
taking this bookmark by default.

It is said in the documentation that a bookmark named @ will be the 
default once cloned. But it is not when you update on an existing 
repository which have not this bookmark.

I think it would be nice if an existing repository (without any 
bookmark) call hg pull ; hg up automatically switch to @ if one ore more 
bookmarks are incoming.

Regards,
David.