BUG #13841: Unable to set autocommit in psql

The following bug has been logged on the website:

Bug reference:      13841
Logged by:          ROBERT
Email address:      floriparob@gmail.com
PostgreSQL version: 9.5rc1
Operating system:   Debian stretch/sid
Description:

O/S

Linux roblaptop 4.3.0-1-amd64 #1 SMP Debian 4.3.3-2 (2015-12-17) x86_64
GNU/Linux


psql session

psql (9.5rc1)
Type "help" for help.

timemanager=> set autocommit off;
ERROR:  syntax error at or near "off"
LINE 1: set autocommit off;
                       ^
timemanager=> set autocommit 'off';
ERROR:  syntax error at or near "'off'"
LINE 1: set autocommit 'off';
                       ^
timemanager=> set autocommit to off;
ERROR:  unrecognized configuration parameter "autocommit"
timemanager=> SET AUTOCOMMIT TO OFF;
ERROR:  unrecognized configuration parameter "autocommit"
timemanager=>

Thought that I'd made a typo but entered as per doco.