[PATCH 7 of 7] strip: strip obsmarkers exclusive to the stripped changeset

[Jun Wu]

Excerpts from Pierre-Yves David's message of 2017-06-03 21:39:37 +0200:
> We keep the split markers unless all the successors of the split are 
> "stripped" (so in you list above, we gets "partially dangling" markers).

That's not the current behavior. On 783394c0c978, the marker gets stripped.
Note: the current behavior is also fine to me.

> This match the current behavior of push and pull thatsynchronizes a 
> split markers as soon as one of the successors is part of the operation.
> 
> Partially dangling has not been a too big concern so far. It is likely 
> something we will study a bit more in the future but it is far down the 
> priority list.
> 
> Cheers,
>