rebase: make sure we don't loose the return code in --confirm option

return _dorebase() to make sure it returns 'return code'.

Differential Revision: https://phab.mercurial-scm.org/D3938

hgext/rebase.py

@@ -874,7 +874,7 b' def _dryrunrebase(ui, repo, opts):'
                 needsabort = False
                 if not ui.promptchoice(_(b'apply changes (yn)?'
                                          b'$$ &Yes $$ &No')):
-                    _dorebase(ui, repo, opts, inmemory=False)
+                    return _dorebase(ui, repo, opts, inmemory=False)
             return 1
         else:
             if confirm: