sed a command macos

auto-changelog.sh

@@ -12,11 +12,11 @@ while read -r line; do
     # get git log PR id, PR made with Github squash merge or Github regular merge
     PR=$(echo $SUBJECT | sed 's/^.*(#\([^&]*\)).*/\1/' | sed 's/^.*#\([^&]*\) from.*/\1/')
     # if PR made with Github squash merge, subject is the body
-    if [ -z $(echo $line | sed -E 's/(.*):{2}(.*)/\2/') ]; then
+    if [ -z "$(echo $line | sed -E 's/(.*):{2}(.*)/\2/')" ]; then
         BODY=$(echo $SUBJECT | sed "s/(#$PR)//g"); else
         BODY=$(echo $line | sed -E 's/(.*):{2}(.*)/\2/') 
     fi
     # add entry to CHANGELOG
-    sed -i'' -e "/## Current Develop Branch/a - [#$PR]($URL/pull/$PR): $BODY" CHANGELOG.md;
+    sed -i'' -e "/## Current Develop Branch/a \- [#$PR]($URL/pull/$PR): $BODY" CHANGELOG.md;
 done <<< "$LOG"
 echo 'CHANGELOG updated'