cmd/go: accept smart quotes when checking for missing gold in TestNoteReading
cmd/go: accept smart quotes when checking for missing gold in TestNoteReading

Fixes #39157

Change-Id: Ia983f5e66698519cd19c1565cfb80e86d08fdfc6
Reviewed-on: https://go-review.googlesource.com/c/go/+/234380
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

CAFxX/go,nawawi/go,cloudflare/go,golang/go,golang/go,cloudflare/go,CAFxX/go,CAFxX/go,nawawi/go,akutz/go,akutz/go,cloudflare/go,akutz/go,CAFxX/go,golang/go,nawawi/go,CAFxX/go,golang/go,nawawi/go,akutz/go,akutz/go,CAFxX/go,cloudflare/go,golang/go,cloudflare/go,akutz/go,golang/go,nawawi/go,CAFxX/go,akutz/go,golang/go,akutz/go,nawawi/go,cloudflare/go,CAFxX/go,cloudflare/go,nawawi/go,golang/go,cloudflare/go,nawawi/go