don't re-run all shared_examples when just one fails, and don't rerun
otherwise colliding example locations
also ensure the various formatters output a unique/correct rerun argument
for any such failing example
test plan:
1. see intentional patchset 1 failures and corresponding output and error
pages
2. see rerun failures on this patchset (if any)
Change-Id: I3f40b576f9f78bd9541cf9934ef348724fa815e6
Reviewed-on: https://gerrit.instructure.com/109235
Tested-by: Jenkins
Reviewed-by: Landon Wilkins <lwilkins@instructure.com>
Product-Review: Landon Wilkins <lwilkins@instructure.com>
QA-Review: Landon Wilkins <lwilkins@instructure.com>