Atsui Kerning And Ligatures

Test for http://bugzilla.opendarwin.org/show\_bug.cgi?id=6137 Disable kerning and some ligatures in the ATSUI code path.

The word “dolor” below should be highlighted in its entirety. The highlight should not extend beyond that word.

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AVAVAVAVAVfififififififi Lorem ipsum dolor sit amèt