doc/go1.20: document changes to the loopclosure vet analysis
Address the release notes TODO regarding the loopclosure analyzer,
documenting the new warning for parallel subtests.
In doing so, choose a structure for the vet section, opting for h4
headings. In recent years, we have used either h4 headings or simple
paragraphs to document vet changes. This year, I thought it worthwhile
to put the timeformat and loopclosure changes into separate sections.
Also document the improvements to reference capture detection introduced
in CL 452615.
Change-Id: I05886f7025d66bb7f2609f787f69d1a769ca6f5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/450735
Run-TryBot: Robert Findley <rfindley@google.com> Reviewed-by: Tim King <taking@google.com> Reviewed-by: Alan Donovan <adonovan@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>