quotes

src/freedombone

   else
       KEY_EXISTS=$(gpg --list-keys "${key_search_text}")
   fi
-  if [ ! $KEY_EXISTS ]; then
+  if [ ! "$KEY_EXISTS" ]; then
       echo "no"
       return
   fi
-  if [ $KEY_EXISTS == *"error"* ]; then
+  if [ "$KEY_EXISTS" == *"error"* ]; then
       echo "no"
       return
   fi