Method spacing

libs/error-stack/src/fmt/mod.rs:481–484

(mut self, spacing: impl Into<Option<Spacing>>)

    }

    fn spacing(mut self, spacing: impl Into<Option<Spacing>>) -> Self {
        self.spacing = spacing.into();
        self
    }

    const fn visible(mut self, visible: bool) -> Self {
        self.visible = visible;