histedit: max(x, key=y) and min(x, key=y) are not available in python 2.4 Use sorted(x, key=y)[-1] or sorted(x, key=y)[0] instead.

vfs: use self.write to write symlink placeholders The existing write() path is much more robust than the hand-rolled version that was inlined here.

histedit: do not use "min" on ctx It does not crash but does not compare revision number at all. We actually remove any call to min because the list is already topologically sorted.

histedit: clean abort when there is nothing to edit