Incomplete code

[YichiZhang0613]

In criterion.rs/plot/src/lib.rs, the comment indicate the code will panics if size is a non-positive value(size <= 0.) while the code will panic if size < 0.

/// # Panics
    ///
    /// Panics if `size` is a non-positive value
    fn set(&mut self, size: FontSize) -> &mut Figure {
        let size = size.0;

        assert!(size >= 0.);

        self.font_size = Some(size);
        self
    }

In criterion.rs/plot/src/filledcurve.rs, the code doesn't check whether opacity is outside the range [0, 1].

/// # Panics
    ///
    /// Panics if `opacity` is outside the range `[0, 1]`
    fn set(&mut self, opacity: Opacity) -> &mut Properties {
        self.opacity = Some(opacity.0);
        self
    }