time: correct time.AppendText's error message
"time.AppendText" returns error messages that start with the prefix
"time.MarshalText: " which seems confusion.
Now correct the message prefix to "time.AppendText: " and add a test
to prevent regression.
Change-Id: I5742c9c3ed802eb79c65d459910deae4f3652ffd
GitHub-Last-Rev:
ce965595c1dafab4a3db3d3f9f9edc9e43c5dea2
GitHub-Pull-Request: golang/go#69914
Reviewed-on: https://go-review.googlesource.com/c/go/+/620597
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>