Tab complete for CREATE SUBSCRIPTION ... CONECTION does not work

Hi hacker,

As $subject detailed, the tab-complete cannot work such as:

   CREATE SUBSCRIPTION sub CONNECTION 'dbname=postgres port=6543' \t

It seems that the get_previous_words() could not parse the single quote.

OTOH, it works for CREATE SUBSCRIPTION sub CONNECTION xx \t, should we fix it?

--
Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.