[PATCH 5 of 6] rebase: demonstrate behavior with requiredest and pull --rebase

[Jun Wu]

Excerpts from Ryan McElroy's message of 2017-03-29 11:38:00 +0100:
> drawdag.py I think you mean?
> 
> I suppose a nice thing about drawdag is that you see the dag being 
> created so its more obvious what's going on without graph logs, but is 
> it worth a re-send do you think? These tests are fairly straightforward, 
> and the exact contents of the files matter so they cause conflicts 
> sometimes and not other times.

Probably not. I just want to advertise tools like "debugbuilddag" and
"drawdag". So new tests can use them.

I should probably just update the wiki.

> 
> >
> >> +  pulling from $TESTTMP/repo
> >> +  searching for changes
> >> +  adding changesets
> >> +  adding manifests
> >> +  adding file changes
> >> +  added 1 changesets with 2 changes to 2 files (+1 heads)
> >> +  abort: you must specify a destination
> >> +  (use: hg rebase -d REV)
> >> +  [255]
> >> +