PG_PAGE_LAYOUT_VERSION - Should be Documented as 3?

doc/src/sgml/storage.sgml says:

"The last 2 bytes of the page header,
<structfield>pd_pagesize_version</structfield>, store both the page size
and a version indicator. Beginning with
<productname>PostgreSQL</productname> 8.0 the version number is 2;
<productname>PostgreSQL</productname> 7.3 and 7.4 used version number 1;
prior releases used version number 0."

But src/include/storage/bufpage.h says:

"/*
* Page layout version number 0 is for pre-7.3 Postgres releases.
* Releases 7.3 and 7.4 use 1, denoting a new HeapTupleHeader layout.
* Release 8.0 changed the HeapTupleHeader layout again.
* Release 8.1 redefined HeapTupleHeader infomask bits.
*/
#define PG_PAGE_LAYOUT_VERSION 3"

So, should the attached be applied?