Syntax of LOCK TABLE ...

Hello,
I'am trying CVS snapshor of postgres and on web page (new features of
postgres 6.5) is:

[...]  New LOCK TABLE IN ... MODE(Vadim)
[...]
 I'am using similar statement on Oracle. But postgres doesn't accept
keyword 'IN'. 

Example:

=> lock table t row share mode;
LOCK TABLE... this works

but:

=> lock table t IN row share mode;
ERROR:  parser: parse error at or near "in" .... but this not

It is mistake in grammar, or is there all OK ?
                                       thanks,
                                               David

-- 
* David Sauer, student of Czech Technical University
* electronic mail: davids@orfinet.cz (mime compatible)