From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Behun <marek.behun@nic.cz>
Date: Mon, 2 Nov 2020 00:08:24 +0100
Subject: [PATCH 10/10] setexpr: Add support for strings
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 <20201101211544.3579850-11-sjg@chromium.org>
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What is the purpose of + operator on strings?
Can't we use setenv "${a}${b}" ?