- rename it as CSVRevisionIterator
- make it take an iterable as input instead of a file name
- make it a true iterator (iter)
- refactor the main method to simplify it
The expected input iterable should generate 3-tuples, corresponding the
the 3 columns of the originally expected CSV file (revision sha1, date,
This makes the class much easier to test.
Depends on D5099.