histedit: select the lowest rev when looking for a root in a revset (bc)...
histedit: select the lowest rev when looking for a root in a revset (bc)
When we specify a revision or a revset we just get the last element from the
list. For revsets this can lead to unintended effects where you specify a
revset like only() but instead histedit selects the highest revision in the
set as root. Therefore we should always use the lowest revision number as
root.