This PR fixes an issue where tools like Prettier remove important
trailing commas in CSS variables, making gradients invalid.
We encoded the `,` in the `--tw-gradient-position` to ensure that _if_
the `var(--tw-gradient-position)` is used, that the `,` was there. And
if the variable was _not_ used that we didn't end up with a double `,,`
rendering the gradient invalid.
However, when running Prettier (there might be other tools that do this
as well), the trailing comma in the `--tw-gradient-position` was removed
which made the entire gradient invalid. E.g.:
```diff
.bg-gradient-to-r {
- --tw-gradient-position: to right in oklab,;
+ --tw-gradient-position: to right in oklab;
background-image: linear-gradient(var(--tw-gradient-stops));
}
```
Notice how the `,` is removed.
This PR fixes that, by moving the `,` to where the variable is being
used. The only side effect is that we have to guarantee that the
`--tw-gradient-position` is always present. In our testing (and using UI
tests) this should be the case.
Related Prettier issue:
https://github.com/prettier/prettier/issues/17058Fixes: #16037
224294122b