tests/test-rebuildstate.out

doc: make links for hg role

The system has a bit of smartness:

  :hg:`update`     -> links to hg.1.html#update
  :hg:`help diffs` -> links to hg.1.html#diffs

adding bar
adding foo
% state dump after
n 666         -1 bar
n 666         -1 foo
% status
! bar
? baz
C foo