From that very section:
5.3.2 - Install or Upgrade to *closest available binary*
The first step in building from source is to make sure you have the
*closest available binary installed.*
You are at: Old -current
Goal -current:
*Binary upgrade to: Latest Snapshot*
then ... *(optional)* Fetch & build -current
No fewer than THREE TIMES IN THAT VERY TINY SUBSECTION...
How can you possibly interpret this as "Upgrading to the closest
binary is optional?"
Please...tell me where I went wrong...
Nick.
(having a very negative view of humanity at the moment...)