Suggest `Option::map_or`(_else) for `if let Some { y } else { x }`

[Luro02]

This code:

if let Some(v) = optional {
    v == &"hello"
} else {
    false
}

could be optimized to

optional.as_ref().map_or(false, |v| v == &"hello")

[playground]

[JarredAllen]

I can take care of implementing this.