archive/tar: narrow trim range for formatter'formatString
Trim s[:len(b)-1] rather than s[:len(b)], since s[len(b)-1] is '/'.
Change-Id: I055da555810c112774549bd13d4faa8bfa0a60dc
GitHub-Last-Rev:
457977514d75a6c72086c2f4d89fb601280b8b90
GitHub-Pull-Request: golang/go#60729
Reviewed-on: https://go-review.googlesource.com/c/go/+/502376
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>