git-codereview: permit dot before colon in change description

Change-Id: I42601f47b318ab0be388480e17f627a757965486
Reviewed-on: https://go-review.googlesource.com/1992
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2 files changed
tree: e437dad0777999e11593bc39b737934712d3714a
  1. README
  2. git-codereview/