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e333b8b86c
* Split no-unused-vars ESLint config to multiple lines
* Exempt variables prefixed with underscore from no-unused-vars rule
This is useful when e.g. using object spread operator to remove only a
certain field from the object.
For example, this can be used to ignore a property from React
component's `this.props`:
render() {
const { someAttribute: _unused, ...rest } = this.props;
return <pre>{ JSON.stringify(rest) }</pre>;
}