Use a better test load for reduce.tst
The current test does not actually reduce anything or delete any events:
reposurgeon% read <roundup.fi
46 events
* roundup
reposurgeon% strip --blobs --reduce
reposurgeon: From 46 to 46 events.
With a different file, the event count actually drops:
reposurgeon% read <implicit.fi
1753 svn events
* implicit
reposurgeon% strip --blobs --reduce
reposurgeon: From 1753 to 1344 events.
(I chose implicit.fi
because it contains multiple branches, making it interesting for the --fileops
flag from !589 (merged))