more work on elastic tabs: - new code enabled, but no comments printed yet (so the effect   of the elastic tabs is not seen yet)
more work on elastic tabs:
- new code enabled, but no comments printed yet (so the effect
  of the elastic tabs is not seen yet)

TBR=r
DELTA=200  (93 added, 69 deleted, 38 changed)
OCL=18951
CL=18951

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go