Fixing 'ASCII-8BIT to UTF-8' error when importing entry that contains the 'ü' character

Author: AllenInstitute

lib/etl/control/destination/file_destination.rb

@@ -93,7 +93,7 @@ def flush
           end
 
           # write the values joined by the separator defined in the configuration
-          f.write(values.join(separator))
+          f.write(values.join(separator).force_encoding("UTF-8"))
 
           # write the end-of-line
           f.write(eol)