[DOCS] 'alter sequence xxx start 200' do nothing

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/9.5/static/functions-sequence.html
Description:

Hello,

According to the doc, with a sequence public.xxx working well, i tried:

Alter sequence public.xxx start 200;

and also:
Alter sequence public.xxx start with 200

It has no effect, without error message, but setval(200) work fine

Misunderstand the doc or is it a bug (PostgreSql 9.6 x86 on localhost) ?