SVG styles are being ignored

Hello,

Firstly thank you for the awesome library.

My issue is with the svg styles being skipped/not appearing in the final output CSS.

I use a grunt plugin grunt-contrib-cssmin

Environment

• grunt-contrib-cssmin version - 2.2.1
• clean-css version - 4.1.11
• node.js version - 6.11.3
• operating system: Windows 8

Input CSS

.node:hover circle {
    r: 18;
    stroke: orange;
}

Actual output CSS

.node:hover circle {
    stroke: orange;
}

Expected output CSS

.node:hover circle {
    r: 18;
    stroke: orange;
}

[prabhjyotsingh]

Is there any chance of this being fixed? What it looks like is this regex (https://github.com/jakubpawlowicz/clean-css/blob/master/lib/optimizer/level-1/optimize.js#L35) is look for >= 3 char in the property name.

[Pedro-vk]

I’ve found this error in an Angular project. AngularCLI implements clean-css on production builds. I’ve tested with units (like r: 20px) but it doesn’t work fine.