This will bring the development version and production version closer
together. It also means that the development version works in older
supported browsers like Chrome v112 where the space is required (even
though the spec allows both)
There are no changes in tests just becaues we already run each test
through Lightning CSS which normalizes these values:
Input:
```css
var(--tw-blur,)
var(--tw-blur, )
```
Lightning CSS output:
```css
var(--tw-blur, )
var(--tw-blur, )
```
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