modified-iterating-set / E4703#

Message emitted:

Iterated set '%s' is being modified inside for loop body, iterate through a copy of it instead.

Description:

Emitted when items are added or removed to a set being iterated through. Doing so raises a RuntimeError.

Correct code:

# This is a placeholder for correct code for this message.

Additional details:

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Created by the modified_iteration checker.