cmd/guru: fix mode map, again
cmd/guru: fix mode map, again

Change-Id: Ic1fef2e237205ed392912601324415af625417b0
Reviewed-on: https://go-review.googlesource.com/19749
Reviewed-by: Dominik Honnef <aeacd46bb4fd3f59504c7762d9af6bd04f20aa1f@honnef.co>
Reviewed-by: Alan Donovan <7069e9552f9d110b0a0f326b96f22f63fb99dfc1@google.com>

dominikh/go-mode.el,emacsmirror/go-mode