Print temp_file.name for troubleshooting

Author: msabramo

docverter.py

@@ -91,6 +91,7 @@ def _process_file(source_text, to_format, from_format, extra_args):
             return resp.text
         else:
             print('temp_file = %r' % temp_file)
+            print('temp_file.name = %r' % temp_file.name)
             raise RuntimeError(
                 'Call to docverter failed - resp = %r; resp.content = %r'
                 % (resp, resp.content))