send-email: ask confirmation if given encoding name is very short

Sometimes people respond "y<ENTER>" (or "yes<ENTER>") when asked this question: Which 8bit encoding should I declare [UTF-8]? We already have a mechanism to avoid accepting a mistyped e-mail address (we ask to confirm when the given address lacks "@" in it); reuse it to trigger the same confirmation when given a very short answer. As a typical charset name is probably at least 4 chars or longer (e.g. "UTF8" spelled without the dash, or "Big5"), this would prevent such a mistake. Signed-off-by: Junio C Hamano <gitster@pobox.com>

Junio C Hamano committed Feb 13, 2015 at 12:20 UTC 852a15d748034eec87adbee73a72689c8936fb8b
1 file changed +1
git-send-email.perl
+1
@@ -733,6 +733,7 @@ if (!defined $auto_8bit_encoding && scalar %broken_encoding) {
733 print " $f\n";
734 }
735 $auto_8bit_encoding = ask("Which 8bit encoding should I declare [UTF-8]? ",
736 + valid_re => qr/.{4}/, confirm_only => 1,
737 default => "UTF-8");
738 }
739