Parent classes get the CSS style of the child classes if you add an extra comma

 Parent classes get the css from nested classes if you accidentally put a comma at the end. I really don't know if this should be considered to be a bug or an issue .. 😅 

Please see below for an example:

```
.testClass {
  
  .childClass, .secondChildClass, {
  	background:red;  
  }
  
}
```

`.testClass` will get a red background. This does not happen when using SCSS for example.