Update app.py

app.py

@@ -10,7 +10,7 @@ def get_pdb(pdb_code="", filepath=""):
         try:
             #move file to home folder to have it accessible from the web
             copyfile(filepath.name, os.path.join(os.getcwd(), os.path.basename(filepath.name))
-            return os.path.join(os.getcwd(), os.path.basename(filepath.name)      
+            return os.path.join(os.getcwd(), os.path.basename(filepath.name))  
         except AttributeError as e:
             return None
     else: