-subject="${1//BRANCH/$branch}"
-filter="sed -e 's/BRANCH/$branch/g'"
-[ "$kconfig" ] &&
- filter="$filter -e 's/KCONFIG_NAME/$kconfig/g'"
-filter="$filter | fmt -s"
-
-{ printf 'Hi all,\n\n'; eval "$filter"; } |
- "$bin_dir"/send_email "$contact" "$cc" "linux-next: $subject"
+subject=${1//BRANCH/$branch}
+filter=( -e "s/BRANCH/$branch/g" )
+if [ -n "$kconfig" ]; then
+ filter+=( -e "s/KCONFIG_NAME/$kconfig/g" )
+fi
+
+{
+ printf 'Hi all,\n\n'
+ sed "${filter[@]}" | fmt -s
+} | "$bin_dir"/send_email "linux-next: $subject" "$contact" "${cc[@]}"