[PATCH v2 18/49] dracut-module-setup.sh: fix a ambiguous variable reference

[Kairui Song]

Wrap the variable with {...}, else it may get interpreted as array due
to the '[' char next to it.

Signed-off-by: Kairui Song <kasong(a)redhat.com&gt;
---
 dracut-module-setup.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index 7a1ff41d..c681413c 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -689,11 +689,11 @@ kdump_install_conf() {
         case "$_opt" in
         raw)
             _pdev=$(persistent_policy="by-id" kdump_get_persistent_dev $_val)
-            sed -i -e "s#^$_opt[[:space:]]\+$_val#$_opt $_pdev#"
${initdir}/tmp/$$-kdump.conf
+            sed -i -e "s#^${_opt}[[:space:]]\+$_val#$_opt $_pdev#"
${initdir}/tmp/$$-kdump.conf
             ;;
         ext[234]|xfs|btrfs|minix)
             _pdev=$(kdump_get_persistent_dev $_val)
-            sed -i -e "s#^$_opt[[:space:]]\+$_val#$_opt $_pdev#"
${initdir}/tmp/$$-kdump.conf
+            sed -i -e "s#^${_opt}[[:space:]]\+$_val#$_opt $_pdev#"
${initdir}/tmp/$$-kdump.conf
             ;;
         ssh|nfs)
             kdump_install_net "$_val"
-- 
2.31.1