BUG #5446: extra dot

The following bug has been logged online:

Bug reference: 5446
Logged by:
Email address: koizumistr@minos.ocn.ne.jp
PostgreSQL version: 9.0beta1
Operating system: MacOS X
Description: extra dot
Details:

There is an extra dot before the sentence "Two transactions ...." in
PostgreSQL 9.0beta1 Documentation 13.3.1.

===
13.3.1. Table-Level Locks

The only real difference between one lock mode and another is the set of
lock modes with which each conflicts (see Table 13-2). . Two transactions
cannot hold locks of conflicting modes on the same table at the same time.
===