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SC2016: Expressions don't expand in single quotes, use double quotes for that. We need to exclude this shellcheck because in some cases, for example in test/vhost/common.sh we echo line to new script file. Signed-off-by: Maciej Wawryk <maciejx.wawryk@intel.com> Change-Id: I98d322d917cbda034787cb29a267b86a8ad7e7ec Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/475713 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>