Function assertFalse

assertFalse(expr, msg?): asserts expr is Falsy
Make an assertion, error will be thrown if expr have truthy value.
Parameters
- expr: unknown
  The expression to test.
- msg: string = ""
  The optional message to display if the assertion fails.
Returns asserts expr is Falsy
Example: Usage
```
import { assertFalse } from "@std/assert";

assertFalse(false); // Doesn't throw
assertFalse(true); // Throws
```
- Defined in assert/false.ts:22