[BUG] git-submodule has bash-ism?

From: Junio C Hamano <gitster@pobox.com>
Date: May 31, 2016, 23:08 UTC
Message-ID: <xmqq1t4h3jxo.fsf@gitster.mtv.corp.google.com>

relative_path ()
{
	local target curdir result
	target=$1
	curdir=${2-$wt_prefix}

I am hoping that Stefan's "gradually rewrite things in C" will make it unnecessary to worry about this one. "git submodule" would not work correctly on posixly correct shells in the meantime.

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