Patch correcting typo in lyx_2_1.py

[José Abílio Matos]

On Wednesday, 30 October 2019 13.30.48 WET Salvatore Falco wrote:
> I am attaching a small patch to correct a typo in lyx_2_1.py, which
> prevented the conversion of a file

You are right. Thank you. :-)

Riki may I apply it to 2.3.x?

Best regards,
-- 
José Abílio