On Tue, Jul 29, 2014 at 01:18:08AM +0200, Fabian Ruch wrote:

> The command line used to recreate root commits specifies the
> effectless option `-C`. It makes git-commit reuse commit message and
> authorship of the named commit. However, the commit being amended
> here, which is the sentinel commit, already carries the authorship
> and log message of the commit being replayed. Remove the option.
> Since `-C` (in contrast to `-c`) does not invoke the editor and the
> `--amend` option invokes it by default, disable editor invocation
> again by specifying `--no-edit`.

I found this description a little backwards. The "-C" does have an
effect, as you noticed in the second paragraph.

I think the reasoning is more like:

  The command line used to recreate root commits uses "-C" to
  suppress the commit editor. This is unnecessarily confusing,
  though, because that suppression is a secondary effect of the
  option. The main purpose of "-C" is to pull the metadata from
  another commit, but here we know that this is a noop, since we
  are amending a commit just created from the same data.

  At the time, commit did not yet know "--no-edit", and this was a
  reasonable way to get the desired behavior. We can switch it to
  use "--no-edit" to make the intended effect more obvious.

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