Shared coding conventions allow teams to collaborate effectively. This rule allows to check that all class names match a provided regular expression.
The default regular expression is based on PEP-8 standard. It allows "CapWords" convention and "snake_case" in lowercase. The "snake_case" convention is accepted by PEP-8 when the class is primarily used as a callable (ex: decorator, context manager, etc...). However the "CapWords" convention is recommended in every case.