Fix regression in 4d134e40399e6c492dff71852d124d60a638223e.
Fix regression in 4d134e40399e6c492dff71852d124d60a638223e.

I missing one string replace.

TBR=vadimsh@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1310083002

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py