encoding/gob: make use of maps.Clone
Change-Id: I6a23219a9e05350bdd9205e19165d5944f15de31
GitHub-Last-Rev:
8c295bf55feaa07cd487e6015029c4682a1480b0
GitHub-Pull-Request: golang/go#69429
Reviewed-on: https://go-review.googlesource.com/c/go/+/612719
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>