[knc1]

SO (checkSums by order of Occurrence) report, with selection of counts == 1 or 2 (of the tree of three).

How to read it:
Single occurrence, release 2.5.8 == New for 2.5.8
Single occurrence, release 2.3 == Dropped after 2.3

Double occurrence, release 2.3 & 2.5.5 == Dropped from 2.5.8
Double occurrence, release 2.5.5 & 2.5.8 == Added after 2.3

Double occurrence, release 2.3 & 2.5.8 == lab126 on 2.5.5 party night.

Etc. etc. etc.

No, it does not provide you with the "answer" -

Yes, it does narrow the number of files to be studied with more conventional source review tools from tens of thousands to only a couple of hundred.

Sorry, once again I had to compress a compressed file.