basic.sh expects "work: None", but "work: " is printed instead, which breaks
presubmit.  This fixes it.

BUG=
R=dpranke@chromium.org

Review URL: https://codereview.chromium.org/17763004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@208799 0039d316-1c4b-4281-b951-d872f2087c98