I'm not sure if this was ever implemented, or broken during a refactor,
but we were ignoring -s/-S flags when writing .csv/.json output with
-o/-O.
Curious, because the functionality _was_ implemented in fold, just
unused. All this required was passing -s/-S to fold correctly.
Note we _don't_ sort diff_results, because these are never written to
.csv/.json output.
At some point this behavior may have been a bit more questionable, since
we use to allow mixing -o/-O and table rendering. But now that -o/-O is
considered an exclusive operation, ignoring -s/-S doesn't really make
sense.
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Why did this come up? Well imagine my frustration when:
1. In tikz/pgfplots, \addplot table only really works with sorted data
2. csv.py has a -s/-S flag for sorting!
3. -s/-S doesn't work!
Christopher Haster
be118ab93d