Re: [PATCH v2 2/2] commit: allow -c/-C for all kinds of --fixup

> From: Erik Cervin-Edin <erik@cervined.in>
>
> The previous commit allowed -m and -F for all --fixup variations.  The
> -c/-C flags were blocked by the same higher-layer incompatibility check
> that previously caught -F, namely die_for_incompatible_opt4() grouping
> them with --fixup.
>
> Drop --fixup from that check and route the resolved commit through
> prepare_amend_commit() in the fixup path, mirroring the no-message-source
> behaviour of --fixup=amend.  With this in place, -m/-F/-c/-C all behave
> consistently across the plain, amend, and reword --fixup forms.
>
> Signed-off-by: Erik Cervin-Edin <erik@cervined.in>
> ---
>  Documentation/git-commit.adoc             |  9 ++--
>  builtin/commit.c                          | 13 +++--
>  t/t7500-commit-template-squash-signoff.sh | 60 +++++++++++++++++++++--
>  3 files changed, 71 insertions(+), 11 deletions(-)

> @@ -1341,7 +1346,7 @@ static int parse_and_validate_options(int argc, const char *argv[],
>  		die(_("options '%s' and '%s' cannot be used together"), "--squash", "--fixup");
>  	die_for_incompatible_opt3(!!use_message, "-C",
>  				  !!edit_message, "-c",
> -				  !!fixup_message, "--fixup");
> +				  !!logfile, "-F");
>  	die_for_incompatible_opt4(have_option_m, "-m",
>  				  !!edit_message, "-c",
>  				  !!use_message, "-C",