git-prompt: preserve value of $? in all cases
Signed-off-by: NTony Finch <dot@dotat.at> Reviewed-by: NSZEDER Gábor <szeder@ira.uka.de> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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Signed-off-by: NTony Finch <dot@dotat.at> Reviewed-by: NSZEDER Gábor <szeder@ira.uka.de> Signed-off-by: NJunio C Hamano <gitster@pobox.com>