Minor simplification

assets/RePEc/rdf2yml.sh

 #!/bin/bash
 
-# Reads the dynare-*.rdf files in the current directory, and then create a
+# Reads the dynare-*.rdf files in the current directory, and then creates a
 # wp.yml suitable for consumption by Jekyll
 
 declare -A wp_authors wp_title wp_year wp_url wp_data_url wp_source_url
@@ -104,7 +104,7 @@ else
 fi
 
 for ((i = ${#wp_authors[@]}; i >= 1; i--)); do
-    if [[ -z ${wp_authors[$i]} ]] || [[ -z ${wp_title[$i]} ]] || [[ -z ${wp_year[$i]} ]] || [[ -z ${wp_url[$i]} ]]; then
+    if [[ -z ${wp_authors[$i]} || -z ${wp_title[$i]} || -z ${wp_year[$i]} || -z ${wp_url[$i]} ]]; then
         echo "Some field is missing in working paper $i!" >&2
         exit 1
     fi