There is no evidence of the profit motive finding its way into Canadian grocery stores.

Here is a concise rewrite of the given text, adhering to the constraint of 70 characters per line:

1. No evidence of grocery profiteering in Canada; expert testimonies discussed anti-competitive practices.
2. Loblaw cut prices on expiring items; public backlash. Metro raised prices after blackout ended.
3. Competitive Bureau considers subpoena powers for grocery sector study.
4. Retail Council suggests tax if grocers don’t co-operate with plans.
5. Fed supports code to ensure fairer market.
6. Grocery Council discusses code’s feasibility.
7. Public reactions from organizations; comments section asks for update.