BUG #5636: extra "(" or missing ")"

The following bug has been logged online:

Bug reference:      5636
Logged by:          KOIZUMI Satoru
Email address:      koizumistr@minos.ocn.ne.jp
PostgreSQL version: 9.0RC1
Operating system:   MacOS X
Description:        extra "(" or missing ")"
Details:

At 33.8.5. The decimal type of PostgreSQL 9.0RC1 Documentation, "(" is
before "by means".
But there is no ")".
| the decimal type can be created either on the stack
| or on the heap (by means of the functions
| PGTYPESdecimal_new() and PGTYPESdecimal_free().

Maybe "(" is not needed or ")" is needed after "PGTYPESdecimal_free()".