BUG #5638: disagreement of argument name

The following bug has been logged online:

Bug reference:      5638
Logged by:          KOIZUMI Satoru
Email address:      koizumistr@minos.ocn.ne.jp
PostgreSQL version: 9.0RC1
Operating system:   MacOS X
Description:        disagreement of argument name
Details:

At 33.10.4. Additional functions of PostgreSQL 9.0rc1 Documentation, the
third argument of the function "dtcvfmtasc" is "dtvalue". But in its
following description, the argument name is referred as "ts".