Improve list-authors.sh to only list new authors

list-authors.sh

@@ -12,8 +12,17 @@ rm -f authors.txt langs.txt
 for file in weblate/*.po; do
   authors=$(git log $commit..HEAD --date=format:"%Y" --format="%aN <%aE>, %ad." $file | grep -v 'anonymous' | sort -u)
   if [ ! -z "$authors" ]; then
-    echo "$file" >> langs.txt
-    echo -e "\n* $file:\n" >> authors.txt
-    echo "$authors" >> authors.txt
+    new_authors=""
+    while read -r author; do
+      found=$(grep "$author" $file)
+      if [ -z "$found" ]; then
+         new_authors+=$author$'\n'
+      fi
+    done <<< "$authors"
+    if [ ! -z "$new_authors" ]; then
+      echo "$file" >> langs.txt
+      echo -e "\n* $file:\n" >> authors.txt
+      echo "$new_authors" >> authors.txt
+    fi
   fi
 done