bookmarks and branches again: files

[Uwe Brauer]

   > The `hg update` is unnecessary. `hg bookmark book2` creates book2 on
   > the current revision and makes it the active bookmark.

Ok, maybe I was confusing this with branches, after creating a branch I
have to update to that branch.


   > Now you've gone back to a commit that doesn't have test2.txt in it.


   > As expected, test2.txt is not in this revision.


   > But it is in here.


   > Indeed, as expected, you have the commit formerly bookmarked 'master'
   > checked out (which by the way in hg should be spelled '@' instead).


Why, I think I have read this somewhere, that @ is recommended but why?


   > If you now check out the commit that was labelled 'book2', you would
   > have test2.txt back. The commits don't go anywhere when you delete the
   > bookmark, only the bookmarks do.

The problem is, how do I know which commit I have to checkout, after
having deleted the bookmark? Is there any command which would allow me
to list all the files which have been added in any revision?

Uwe