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There is a newer version: 4.23.0.17664

This rule raises an issue when backticks are used instead of repr.
Why is this an issue?
In Python 2, backticks are a deprecated alias for repr(). The syntax was removed in Python 3. To make the transition to Python 3
easier, they should not be used anymore.
Noncompliant code example
return `num`  # Noncompliant

Compliant solution
return repr(num)