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

histedit: rename `revs` in `ctxs` inside the `between` function The variable content is actually contexts, not revision numbers.

test: fix invalid redirection for histedit text Appending to the file is wrong, we want new content.

vfs: backout fchmod change from 76b73ce0ffac Only works on Unix with Python >= 2.6, need a different fix.

histedit: refuse to edit public changeset Public changeset are immutable. This changeset enforce that in histedit.

histedit: ignores hidden revision when checking for orphaned nodes We do not want hidden revision to block histedit. They are already "dead" and we do not care about dead orphans. see similar changeset 9e2dc0d292cd for rebase.

histedit: simplify computation of edited set (issue3620) This complex code can be replaced by two simple revset calls.