Feature Request: Support `ensure!` without error message like anyhow.

[oxcrow]

Hello,

Would it be possible to allow the use of ensure! macro without an error message.

Sometimes I just want to write the assertion test without worrying about creating a pretty error message.

There are many instances where it is preferable to not provide an error message with ensure!.

• While debugging something and writing quick tests for it.
• While writing assertions.
• While writing unit tests.
• etc.

It would help if that was supported by miette.

Anyhow supports this feature.

The code would look like...

macro_rules! ensure {
  ($condition: expr) => {
       miette::ensure!($condition, "ensure failed");
  }
}

Thank you
~ oxcrow