[release-branch.go1.13] doc/1.13: remove draft note and make various fixes
Updates #33954
Change-Id: Idfe71bf825adcd7cbf70cd139b3e779963394ff6
Reviewed-on: https://go-review.googlesource.com/c/go/+/192105
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
(cherry picked from commit
dec16794cf9136f8887e08391c01f1265b876ddb)
Reviewed-on: https://go-review.googlesource.com/c/go/+/192743
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>