[release-branch.go1.16] cmd/go: fix godoc formatting for text from 'go help install'
Fixes #44860
Change-Id: I5a12c6437a91ce59307483ffcc70e084edc32197
Reviewed-on: https://go-review.googlesource.com/c/go/+/301329
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
(cherry picked from commit
86bbf4beee276b9a7f9a427a9d1a9277bd904709)
Reviewed-on: https://go-review.googlesource.com/c/go/+/301429