This is makeindex, version 2.15 [TeX Live 2017] (kpathsea + Thai support).
Scanning input file testdoc.idx....done (11 entries accepted, 0 rejected).
Sorting entries....done (41 comparisons).
Generating output file testdoc.ind....done (37 lines written, 0 warnings).
Output written in testdoc.ind.
Transcript written in testdoc.ilg.
