runtime/cgo: fix cgoCheckArg description
The description is misleading: cgoCheckArg is called by both
cgoCheckPointer and cgoCheckResult.
Mention cgoCheckResult in the cgoCheckArg description. Remove extra
spaces between words.
For #75856
Change-Id: I6780cda76b5cb7b4f9af3fbaa37a6c5099cc8d7d
GitHub-Last-Rev:
531928b679ab138bf9bfe47a1bf6470d582776f3
GitHub-Pull-Request: golang/go#75992
Reviewed-on: https://go-review.googlesource.com/c/go/+/713520
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>