fixes CNVS-37751
test plan
- set change_threshold to 10
- upload an empty file or one that is more than
10% different from the diffing master
- it should not delete all items, or not use
diffing
- run rake doc:api and verify documentation
Change-Id: Ifced7e4b76b747b37a7c0b0d5dd065da4a8d68dc
Reviewed-on: https://gerrit.instructure.com/116886
Tested-by: Jenkins
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Product-Review: Rob Orton <rob@instructure.com>
Rob Orton