Re: [csswg-drafts] [css-grid] Percentages and intrinsic size

One thing I don't know how is resolved for percentage gaps is when the sum of the percentages are 100% or more.
Example:
```css
grid-template-columns: 20px 20px; grid-column-gap: 100%;
```
Another example:
```css
grid-template-columns: 20px 20px 20px; grid-column-gap: 50%;
```

Current Firefox implementation [has issues with that things](https://codepen.io/mrego/pen/MEObwZ?editors=1100):

![Current output of the linked Codepen showing issues with percentages over 100%](https://user-images.githubusercontent.com/11602/31164725-a6f4207e-a8e8-11e7-8366-848cf0aa2b13.png)


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Received on Wednesday, 4 October 2017 07:45:09 UTC