histedit: allow histedit --continue when not on a descendant (BC) Previously we would not allow --continue if the current working copy parent was not a descendant of the commit produced by the previous histedit step. There's nothing really blocking us from continuing the histedit in this situation, so let's stop aborting in this case. This is technically a BC change, but it is making things more forgiving so I think it's ok. In the future we will likely add an 'exec' action to histedit, which means the user can do whatever they want during the middle of a histedit (like perhaps calling 'hg update'), which means we'll need to support this case eventually anyway.