Question about Install doc's

<bigger> In the Install file that comes with version 6.4.2, step number
18 says the following:

b. Several regression tests could failed if the

user's locale collation scheme is different

from that of standard C locale.

If you configure and compile Postgres with

the --enable-locale option then set locale

environment to C (or unset all LC_*

variables) by putting these additional lines

to your login environment before starting

postmaster:

LC_COLLATE=C

LC_CTYPE=C

LC_COLLATE=C

export LC_COLLATE LC_CTYPE LC_COLLATE

</bigger>

Why does it say to set LC_COLLATE twice? Does anyone know if the
second LC_COLLATE=C should be something else or does it really mean to
set only two variables?