This PR fixes an issue where using the class shorthand in Slim
templates, followed by an `(` results in the last class being ignored.
E.g.:
```slim
body.border-t-4.p-8(class="#{body_classes}" data-hotwire-native="#{hotwire_native_app?}" data-controller="update-time-zone")
```
This is because we will eventually extract `p-8` but it's followed by an
invalid boundary character `(`.
To solve this, we make sure to replace the `(` with a space. We already
do a similar thing when the classes are followed by an `[`.
One caveat, we _can_ have `(` in our classes, like `bg-(--my-color)`.
But in my testing this is not something that can be used in the
shorthand version.
E.g.:
```slim
div.bg-(--my-color)
```
Compiles to:
```html
<div --my-color="" class="bg-"></div>
```
So I didn't add any special handling for this. Even when trying to
escape the `(`, `-` and `)` characters, it still doesn't work. E.g.:
```slim
div.bg-\(--my-color\)
```
Compiles to:
```html
<div class="bg-">\(--my-color\)</div>
```
# Test plan
1. Added test for the issue
2. Existing tests pass
3. Verified via the extractor tool:
| Before | After |
| --- | --- |
| <img width="958" alt="image"
src="https://github.com/user-attachments/assets/f72c420e-5429-424f-a01d-12f724062bf2"
/> | <img width="958" alt="image"
src="https://github.com/user-attachments/assets/b0cc8f2f-97a8-4fca-8813-3bb1da8d99a8"
/> |
---
Fixes: #17277
f369e22172