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Date:   Wed, 18 Apr 2018 00:54:15 +0000
From:   Eric Wong <e@80x24.org>
To:     Stefan Agner <stefan@agner.ch>
Cc:     git@vger.kernel.org
Subject: Re: [PATCH] send-email: avoid duplicate In-Reply-To/References
Message-ID: <20180418005415.GA31588@dcvr>
References: <20180417211630.22873-1-stefan@agner.ch>
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Stefan Agner <stefan@agner.ch> wrote:
> This addresses the issue reported here:
> https://public-inbox.org/git/997160314bbafb3088a401f1c09ccb08@agner.ch/

Thanks for bringing this up.

> --- a/git-send-email.perl
> +++ b/git-send-email.perl
> @@ -1642,10 +1642,15 @@ foreach my $t (@files) {
>  			elsif (/^Content-Transfer-Encoding: (.*)/i) {
>  				$xfer_encoding = $1 if not defined $xfer_encoding;
>  			}
> +			elsif (/^In-Reply-To: (.*)/i) {
> +				$in_reply_to = $1;
> +			}
> +			elsif (/^References: (.*)/i) {
> +				$references = $1;
> +			}

References: can span multiple lines with --thread=deep in format-patch
(technically any header can be, but References: is common)