Translation of the NextOID message in pg_controldata

Hello,

Commit cb298616463 changed the following line:

- printf(_("Latest checkpoint's NextOID: %u\n"),
+ printf(_("Latest checkpoint's NextOID: " OID8_FORMAT "\n"),

It appears that xgettext does not recognize PostgreSQL's OID8_FORMAT
macro and therefore extracts only the preceding string literal as the
msgid. In contrast, PRIu64, which is used in the same file, is
correctly extracted as %<PRIu64>. Therefore, shouldn't we use "%"
PRIu64 instead of OID8_FORMAT here as well?

I confirmed that, with the attached patch, the complete string is
correctly extracted as the msgid in the PO files. The patch also adds
a comment at the macro definitions noting that *_FORMAT macros cannot
be used directly in translatable messages.

Regards,

--
Kyotaro Horiguchi
NTT Open Source Software Center