git-codereview: hide +0 scores and +0 labels except Code-Review

Otherwise the list of reviewers is repeated for every label.
This is happening now that we have trybot labels.

Change-Id: Ie1fe0369d5944319c67fc9182ff3afbfd366687c
Reviewed-on: https://go-review.googlesource.com/4570
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
2 files changed
tree: 082e82418f8689f4875be87975b54e32603cb635
  1. .gitattributes
  2. README
  3. git-codereview/