evolve: revert amend

[anatoly techtonik]

On Mon, Aug 11, 2014 at 6:25 PM, Matt Mackall <mpm at selenic.com> wrote:
> On Mon, 2014-08-11 at 18:15 +0300, anatoly techtonik wrote:
>> On Mon, Aug 11, 2014 at 5:39 PM, Augie Fackler <lists at durin42.com> wrote:
>> > On Mon, Aug 11, 2014 at 10:37 AM, anatoly techtonik <techtonik at gmail.com> wrote:
>> >>> I'd spell what he wants as
>> >>>
>> >>> hg touch --hidden 60196217f989
>> >>> hg co tip # probably don't need this
>> >>> hg revert --all -r 79c37431f559
>> >>> hg prune 79c37431f559
>> >>>
>> >>> which should effectively undo the bad amend. For paranoia, start from
>> >>> a clean working copy.
>> >>
>> >> Hmm. I fail to see how that changes the status of files to
>> >> "modified". The problem started when changes from modified files
>> >> slipped into amended commit, because I didn't pay attention there
>> >> are more changes in repo and forgot to choose only needed ones.
>> >
>> > The revert step does that. Note that I've made the same mistake at
>> > least once, and undone it this way.
>>
>> $ hg revert -h
>> ...
>> restore files to their checkout state
>
> Revert is probably easiest to explain like this:
>
> # undo our change to foo:
> hg revert foo      == hg cat -r . foo > foo
>
> # get an old version of foo:
> hg revert -r X foo == hg cat -r X foo > foo

How about changing help message to:
revert file contents to specified revision

?