Generated by running example 1 from the Feature File specification
section 5.f.i (Specifying a Chain Sub rule and marking sub-runs)
through AFDKO's makeotf tool, and then decompiling the resulting
GSUB table with ttx.
The actual test is commented out because the current version of feaLib
is not able to produce this output yet; marked with a TODO comment.
3f5e2ae820