bug#54047: 26.3; Doc of `fill-region-as-paragraph'

[Eli Zaretskii]

> From: Drew Adams <drew.adams@oracle.com>
> Date: Thu, 17 Feb 2022 22:25:34 +0000
> 
> 1. The doc string isn't clear at all wrt arguments NOSQUEEZE and
> SQUEEZE-AFTER.  There's no explanation of what is meant by
> canonicalizing spaces.
> 
> 2. (elisp) `Filling' is OK for NOSQUEEZE: it says that non-nil means to
> leave whitespace other than line breaks untouched.  But even that Elisp
> doc punts for SQUEEZE-AFTER, saying a position value means "don't
> canonicalize spaces before that position."  (That's the only occurrence
> of "canonicalize" in this node.  No explanation.)

Thanks, fixed.