Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2021-12-10 23:48 0b87b0ae

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chore(algebra/group_with_zero/defs: Rename comm_cancel_monoid_with_zero to cancel_comm_monoid_with_zero (#10669) We currently have cancel_comm_monoid but comm_cancel_monoid_with_zero. This renames the latter to follow the former. Replaced comm_cancel_ by cancel_comm_ everywhere.

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