Method fmt

src/expr/src/explain/text.rs:1062–1064

(&self, f: &mut fmt::Formatter<'_>)

impl fmt::Display for MirScalarExpr {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        self.format(f, None)
    }
}

/// A helper struct for wrapping expressions whose text output is modulated by