Prevent word splitting in visit script

history_scripts/visit_migrated_documents.sh

@@ -6,7 +6,7 @@ then
 fi
 script_directory=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 url_file=$script_directory/hedgedoc_documents_to_visit.url
-readarray -t url_array < $url_file
+readarray -t url_array < "$url_file"
 for i in "${url_array[@]}"
 do
   eval "$open_command $i"