fix(utils): remove unnecessary `$` from variable in arithmetic (#380537)

Changed files
+1 -1
nixos
lib
+1 -1
nixos/lib/utils.nix
···
<<'EOF'
${toJSON set}
EOF
-
(( ! $inherit_errexit_enabled )) && shopt -u inherit_errexit
+
(( ! inherit_errexit_enabled )) && shopt -u inherit_errexit
'';
/*