Update app.py

app.py

@@ -66,12 +66,12 @@ def write_articles_to_csv(articles, filename="articles.csv"):
 
 def articles_to_csv_string(articles): 
     output = StringIO()
-        writer = csv.writer(output)
+    writer = csv.writer(output)
     # writer.writerow(['Authors', 'Year', 'Title', 'DOI', 'Abstract', 'Journal'])
-        writer.writerow(['Year', 'Title', 'Abstract', 'DOI'])
+    writer.writerow(['Year', 'Title', 'Abstract', 'DOI'])
     for article in articles:
         # writer.writerow([article['Authors'], article['Year'], article['Title'], article['DOI'], article['Abstract'], article['Journal']])
-            writer.writerow([article['Year'], article['Title'], article['Abstract'], article['DOI']])    
+        writer.writerow([article['Year'], article['Title'], article['Abstract'], article['DOI']])    
     output.seek(0)
     return output.getvalue()