In override_features_indic(), we currently disable 'kern' in
uniscribe-compatible mode. However, at least for the Noto Telugu font on
Win2012Server, I'm seeing that 'kern' *is* applied by Uniscribe. As a
result, running tests with it disabled is leading to a lot of unwanted
positioning discrepancies.
So I think we need to look into this again; offhand, I don't recall what
tests led us to conclude it wasn't applied. Or maybe it's a recent
(Win8?) change in Uniscribe behavior...? (I haven't tried to re-test on
older Windows versions yet.)
JK
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